Mackie 650 User manual

OWNER’S MANUAL

1600W POWERED LOUDSPEAKERS

SRM550 • SRM650 • SRM750

SRM550 • SRM650 • SRM750 Powered Loudspeakers

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manu-

facturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves,

or other apparatus (including ampliﬁers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug.

A polarized plug has two blades with one wider than the other. A grounding-

type plug has two blades and a third grounding prong. The wide blade or

the third prong are provided for your safety. If the provided plug does not ﬁt

into your outlet, consult an electrician for replacement of the obsolete outlet.

10.

Protect the power cord from being walked on or pinched particularly at plugs,

convenience receptacles, and the point where they exit from the apparatus.

11.

Only use attachments/accessories speciﬁed by the manufacturer.

12.

Use only with a cart, stand, tripod, bracket, or table

speciﬁed by the manufacturer, or sold with the

apparatus. When a cart is used, use caution when

moving the cart/apparatus combination to avoid injury

from tip-over.

13.

Unplug this apparatus during lightning storms or when

unused for long periods of time.

14.

Refer all servicing to qualiﬁed service personnel. Servicing is required when

the apparatus has been damaged in any way, such as power-supply cord

or plug is damaged, liquid has been spilled or objects have fallen into the

apparatus, the apparatus has been exposed to rain or moisture, does not

operate normally, or has been dropped.

15.

This apparatus shall not be exposed to dripping or splashing, and no object

ﬁlled with liquids, such as vases or beer glasses, shall be placed on the

apparatus.

16.

Do not overload wall outlets and extension cords as this can result in a risk

of ﬁre or electric shock.

17.

This apparatus has been designed with Class-I construction and must be

connected to a mains socket outlet with a protective earthing connection

(the third grounding prong).

18.

This apparatus has been equipped with a rocker-style AC mains power

switch. This switch is located on the rear panel and should remain readily

accessible to the user.

PORTABLE CART

WARNING

CAUTION

The lightning ﬂash with arrowhead symbol within

an equilateral triangle is intended to alert the user

to the prescence of uninsulated “dangerous voltage”

within the product’s enclosure, that may be of signiﬁcant

magnitude to constitute a risk of electric shock to persons.

RISK OF ELECTRIC SHOCK! DO NOT OPEN!

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED PERSONNEL.

The exclamation point within an equilateral triangle is

intended to alert the user of the presence of important

operating and maintaining (servicing) instructions in the

literature accompanying the appliance.

Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.

Apparatet må tilkoples jordet stikkontakt.

Apparaten skall anslutas till jordat uttag.

19.

The MAINS plug or an appliance coupler is used as the disconnect device,

so the disconnect device shall remain readily operable.

20. NOTE: This equipment has been tested and found to comply with

the limits for a Class B digital device, pursuant to part 15 of the FCC

Rules. These limits are designed to provide reasonable protection

against harmful interference in a residential installation. This equipment

generates, uses, and can radiate radio frequency energy and, if not

installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television

reception, which can be determined by turning the equipment off and

on, the user is encouraged to try to correct the interference by one or

more of the following measures:

• Reorientorrelocatethereceivingantenna.

• Increasetheseparationbetweentheequipmentandthereceiver.

• Connecttheequipmentintoanoutletonacircuitdifferentfromthat

to which the receiver is connected.

• Consultthedealeroranexperiencedradio/TVtechnicianforhelp.

CAUTION: Changes or modiﬁcations to this device not expressly approved

by LOUD Technologies Inc. could void the user's authority to operate the

equipment under FCC rules.

21.

This apparatus does not exceed the Class A/Class B (whichever is

applicable)

limits for radio noise emissions from digital apparatus as

set

out in the radio interference regulations of the Canadian Department

Communications.

ATTENTION —

Le présent appareil numérique n’émet pas de bruits radioélec-

triques dépassant las limites applicables aux appareils numériques de class

A/de class B (selon le cas) prescrites dans le réglement sur le brouillage

radioélectrique édicté par les ministere des communications du Canada.

22.

Exposure to extremely high noise levels may cause permanent hearing

loss. Individuals vary considerably in susceptibility to noise-induced hearing

loss, but nearly everyone will lose some hearing if exposed to sufﬁciently

intense noise for a period of time. The U.S. Government’s Occupational

Safety and Health Administration (OSHA) has speciﬁed the permissible

noise level exposures shown in the following chart.

According to OSHA, any exposure in excess of these permissible limits

could result in some hearing loss. To ensure against potentially dangerous

exposure to high sound pressure levels, it is recommended that all persons

exposed to equipment capable of producing high sound pressure levels

use hearing protectors while the equipment is in operation. Ear plugs or

protectors in the ear canals or over the ears must be worn when operating

the equipment in order to prevent permanent hearing loss if exposure is in

excess of the limits set forth here:

Duration, per

day in hours

Sound Level dBA,

Slow Response

Typical Example

8 90 Duo in small club

6 92

4 95 Subway Train

3 97

2 100 Veryloudclassicalmusic

1.5 102

1 105 John screaming at Troy about deadlines

0.5 110

0.25 or less 115 Loudest parts at a rock concert

WARNING — To reduce the risk of ﬁre or electric shock,

do not expose this apparatus to rain or moisture.

CAUTION — To prevent electric shock hazard, do not connect

to mains power supply while grille is removed.

Correct disposal of this product: This symbol indicates that this product should not be disposed of with your household

waste, according to the WEEE directive (2012/19/EU) and your national law. This product should be handed over to

an authorized collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type

of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances

that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will

contribute to the effective usage of natural resources. For more information about where you can drop off your waste

equipment for recycling, please contact your local city ofﬁce, waste authority, or your household waste disposal service.

Important Safety Instructions

Owner’s Manual

Contents Features

Part No. SW0985 Rev. B 07/14

• 1600Wsystempowerpairedwithcustom 

  transducersdelivergig-levelvolumeswith

  roomtospare

 • 12"high-outputLFdriver/1.4"titaniumdome

   compressiondriver[SRM550]

 • 15"high-outputLFdriver/1.4"titaniumdome

   compressiondriver[SRM650]

  • 2x15"high-outputLFdriver/1.4"titanium

   domecompressiondriver[SRM750]

• “Built-Like-A-Tank”all-wood,internally

  bracedcabinetdeliversprofessional-grade

  road-worthiness

 • Rugged18-gaugesteelgrilleandne-textured,

   sleekblackcabinetnish

 • Frontportedformaximumlow-endextension

   andpunch

• High-DenitionAudioProcessingforprofessional

  soundwithunmatchedclarity

 • Patentedacousticcorrectiondevelopedwith

   touringgeniusesatEAW

 • Precision2-waydigitalcrossover

 • Drivertimealignmentandphasecorrection

• Quickone-buttonSpeakerModeselection

  forapplication-specicvoicing(PA,DJ,Monitor,

  Soloist,FillandSpeech)

• Effortlesslyeliminatenastyfeedbackwith

  one-buttonautomaticFeedbackDestroyer

• Integrated2-channelmixerfeaturingdual 

  Wide-Z

™

inputs

 • Handlesanythingfrommicstoguitarsto 

   mixerswithasingletwistofthegainknob

 • IncludesstereoRCAinputsforeasyconnection

   tomusicsource

 • Perfectforthesinger/songwriter,

   pluginandleavethemixerathome

• SmartProtect

™

DSPkicksintoprotect

  yourinvestmentwhenthingsgetpushed

  alittletoohard

• FlyableviastandardM10eyebolts

• Monitor-specic60˚angleandvoicing

  modeperfectforcuttingthroughonstage 

  [SRM550/SRM650]

Like us

Watch our dang videos

Important Safety Instructions .................................. 2

Contents ................................................................. 3

Features ................................................................. 3

Introduction ............................................................ 4

How To Use This Manual ......................................... 4

Getting Started ....................................................... 4

Things To Remember ................................................ 4

Hookup Diagrams .................................................... 5

SRM Loudspeaker: Rear Panel Features .................... 9

1. Power Connection ......................................... 9

2. Power Switch ............................................... 9

3. XLR and 1/4" Combo Inputs .......................... 9

4. Gain Knobs ................................................. 10

5. RCA Inputs [Channel 2 Only] ....................... 10

6. Thru Output ................................................ 11

7. Ch 1/Mix Switch [Thru Output] ................... 11

8. Speaker Mode ............................................ 11

9. Feedback desTROYer ................................... 11

10. Main Logo Switch / Limit LED .................... 12

11. Extra Knobs, Buttons and LEDs .................. 12

12. Rock ‘n Roll .............................................. 12

Smart Protect ....................................................... 13

Limiting .......................................................... 13

Overexcursion Protection ................................ 13

Thermal Protection .......................................... 13

AC Power ............................................................. 13

Care and Maintenance ........................................... 13

Placement ............................................................. 14

Room Acoustics ............................................... 15

Rigging ............................................................... 16

Rigging Design Practices .................................. 16

Rigging Hardware and Accessories ................... 16

Rigging Notes ................................................. 16

Important Rigging Reminder ............................ 17

Appendix A: Service Information ............................ 18

Appendix B: Connections ....................................... 20

Appendix C: Technical Information .......................... 21

SRM550 Dimensions & Frequency Response ..... 23

SRM650 Dimensions & Frequency Response ..... 24

SRM750 Dimensions & Frequency Response ..... 25

SRM Loudspeaker Block Diagram ..................... 26

Limited Warranty .................................................. 27

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Getting Started

Introduction

SRM1600WHigh-DenitionPowered

LoudspeakersdeliveranewlevelofSRMruggedness,

clarityandsimplicitywithunmatchedbassresponse.

Hugesystempowerispairedwithcustomtransducers

withinprofessional-grade,internally-bracedall-wood

cabinetsthatare“Built-Like-A-Tank”.

TheseSRMloudspeakersfeatureourHighDenition

AudioProcessing

™

,includingpatentedacoustic

correctionDSP,plussystemoptimizationtoolslike

application-specicspeakermodesandanamazingly

accuratefeedbackdestroyer.

Readyforanything,theintegrated2-channelmixer

withWide-Z

™

inputscanhandleanysignalwithease.

TheseSRMloudspeakersdeliverthehighoutput,

amazingsoundandprovendurabilityyoudemand

foryourprofessionalPAsystem.

How to Use This Manual:

Afterthisintroduction,agettingstartedguide

willhelpyougetthingssetupfast.Thehookup

diagramsshowsometypicalsetups,whilethe

remainingsectionsprovidedetailsoftheSRM550,

SRM650andSRM750loudspeakers.

Thisiconmarksinformationthatiscritically

importantoruniquetotheloudspeakers.

Foryourowngood,readandrememberthem.

Thefollowingstepswillhelpyousetupthe

loudspeakersquickly.

1.Makeallinitialconnectionswiththepower

switchesOFFonallequipment.Makesurethemaster

volume,level,orgaincontrolsareallthewaydown.

2.Connecttheline-leveloutputsfromthemixing

console(orothersignalsource)totheinputsonthe

rearpaneloftheSRMloudspeakers.

3.Makesurethattheloudspeaker’sgainknobsareset

to(ornear)“line”.

4.ConnectthesuppliedACpowercordstothe 

IECsocketsontherearpanelofeachloudspeaker.

PlugtheotherendintoanACoutletproperlycongured

withthecorrectvoltageasindicatedbelowtheIEC

socket.

5.Turnthemixer(orothersignalsource)on.

6.Turntheloudspeakerson.

7.Startthesignalsourceandraisethemixer’s

mainL/Rfaderupuntilaudiomaybeheard

throughtheloudspeakers.

8.Adjustthemastervolumeofthemixertoa

comfortablyloudlisteninglevel.

9.Readtherestofthismanualtolearnhowtosetthe

speakermodeandfeedbackdestroyertoreallydialina

soundforthevenue.

Things to Remember:

• Neverlistentoloudmusicforprolongedperiods.

  PleaseseetheSafetyInstructionsonpage2for

  informationonhearingprotection.

• Asageneralguide,SRMloudspeakersshould

  beturnedonlast,afteranymixerorothersignal

  source.Assuch,theyshouldalsobeturnedoff

  rst.Thiswillreducethepossibilityofanyturn-on

  orturn-offthumpsandothernoisesgenerated

  byanyupstreamequipmentfromcomingoutof

  thespeakers.

• Savetheshippingboxesandpackingmaterials!

  Youmayneedthemsomeday.Besides,the 

  catswillloveplayinginthemandjumpingoutat

  youunexpectedly.Remembertopretendlikeyou

  aresurprised!

• Saveyoursalesreceiptinasafeplace.

Please write your serial number here for future

reference (i.e., insurance claims, tech support,

return authorization, make dad proud, etc.)

Purchased at:

Date of purchase:

Owner’s Manual

Hookup Diagrams

Small Coffee Shop

SIG/OL SIG/OL

POWER CONSUMPTION 200W

SIG/OL SIG/OL

POWER CONSUMPTION 200W

SIG/OLSIG/OL

SRM loudspeakers are the perfect tool for singer-songwriters touring the local coffee shops. Bring your

favorite axe and mic, SRM loudspeakers and cables and power cords.

In this example, a dynamic microphone is connected to the channel 1 input of an SRM650 loudspeaker.

Be sure that the gain knob is set to “mic” in order to get an extra boost for the mic. If anything other than

a microphone is attached to a channel input, make sure the gain knob is set to anything other than “mic”

[“line” is a safe bet]. From there, adjust the gain as described on page 10.

Now grab your axe and plug it directly into the channel 2 input. Or if you use effects, connect the guitar

to the effects input and another cable from the effects output to the channel 2 input. Set the channel two

gain knob to “line”.

An additional SRM550 or SRM650 loudspeaker is great for monitoring. Simply connect a cable from

the main SRM loudspeaker’s THRU jack to the monitor loudspeaker’s channel 1 input [gain knob set to

“line”]. Also, make sure the Ch 1/Mix switch is down on the main SRM, as well, so a mix of

the vocals and guitar is relayed to the monitor.

For the output, you will want to set a speaker mode, described in detail on page 11. For this type

of setup, PA works well for the main SRM650. However, don’t count out the soloist mode! It has a

nice low cut and a brilliant high end. Select the monitor mode for the SRM550 monitor. Lastly, you

can ring out before you play, utilizing the SRM’s feedback destroyer [page 11] or just let it kill the

feedback while playing.

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Hookup Diagrams continued...

Small Club System

SRM

550

SRM

650

VAR

POWER CONSUMPTION 200W

SIG/OL SIG/OL

POWER CONSUMPTION 200W POWER CONSUMPTION 200W

SIG/OL SIG/OL

13 DELAY 1 (300ms)

14 DELAY 2 (380ms)

15 DELAY 3 (480ms)

16 REVERB + DLY (250ms)

8K4K2K1K500250125

TAPE

ST RETURN MAIN OUT PHONES

FOOTSWITCH

PHONES

TAPE

OUT

(UNBALANCED)

0dB=0dBu

MAIN

METERS

BREAK

(MUTES ALL CHANNELS)

PHANTOM

POWER

STEREO GRAPHIC EQ

FX SEND

MID

2.5kHz

MID

2.5kHz

MID

2.5kHz

MID

2.5kHz

MID

2.5kHz

80Hz

LOW

+15-15

INSERT

LOW CUT

100 Hz

GAIN

+50

-20dB

+30dB

12kHz

PAN

AUX

+15

MON

+15

80Hz

LOW

+15-15

LOW CUT

100 Hz

GAIN

+50

-20dB

+30dB

12kHz

PAN

AUX

+15

MON

+15

80Hz

LOW

+15-15

LINE IN 2 LINE/HI-Z IN 1

INSERT

BAL/

UNBAL

(MONO) (MONO) (MONO) (MONO)

LINE IN 3

LINE IN 4

BAL/

UNBAL

LINE IN 5

LOW CUT

100 Hz

GAIN

3/4

12kHz

PAN

AUX

+15

MON

+15

80Hz

LOW

+15-15

LOW CUT

100Hz

GAIN

U +50

5/6

12kHz

LEVEL

SET

LEVEL

SET

LEVEL

SET

LEVEL

SET

PAN

AUX

+15

MON

+15

GAIN

MIC MIC MIC MIC

80Hz

LOW

+15-15

+20-20

7/8 ST RTN FX RTN

12kHz

PAN

AUX

+15

MON

+15

FX TO MON

FX MASTER

+15

LINE IN 6

BAL/

UNBAL

LINE IN 7

LINE IN 8

BAL/

UNBAL

BAL/

UNBAL

BAL/

UNBAL

MON SEND

BAL/

UNBAL

BAL/

UNBAL

MUTE

PRESETS

FX PRESETS

OL OL OL OL OL

INPUT LEVEL

USB

+20

TAPE LEVEL

+20

MON

MAIN

1 2 3/4 5/6 7/8

USB THRU

LINE

HI-Z

MAIN MIX

MON

EQ IN

BYPASS

01 BRIGHT ROOM

02 WARM LOUNGE

03 SMALL STAGE

04 WARM THEATER

05 WARM HALL

06 CONCERT HALL

07 PLATE REVERB

08 CATHEDRAL

09 CHORUS

10 CHORUS + REV

11 DOUBLER

12 TAPE SLAP

MAX

LINE

HI-Z

MUTE MUTE MUTE MUTE MUTE MUTE

48V

PROFESSIONAL MIC/LINE MIXER WITH FX

SRM

550

SRM

650

VAR

SIG/OLSIG/OL

In this example, an SRM1850 subwoofer and additional SRM650 loudspeaker have been added to the

mix, giving our sound system some extra beef. It is a perfect setup for a small club.

Here, the L/R outputs of a ProFX8 mixer are connected directly to the channel A and B inputs of a single

SRM1850 subwoofer.

The channel A and B high pass outputs of the SRM1850 subwoofer are connected directly to the channel

1 inputs of each SRM650 loudspeaker. Be sure that the gain knob on each is set to “line” or get ready to

be blasted! Select the SRM650 high pass mode on the SRM1850 for a matched system.

SRM loudspeakers are also perfect for use as stage monitors. Simply connect a cable from each aux send

to the channel 1 input of each SRM loudspeaker used as a monitor.

For the output, you will want to set a speaker mode, described in detail on page 11. For this type of

setup, we recommend selecting the PA speaker mode for live sound on your SRM loudspeakers. If using

any SRM loudspeakers as monitors, select the monitor speaker mode.

Owner’s Manual

Hookup Diagrams continued...

BIG PA

Feel the awesome power! In this example, a pair of SRM2850 subwoofers line each side of the venue...

four subs total! The top sub on each side is connected to an SRM750 loudspeaker. This fully powered PA

is desired when you really need a slammin’ system with deep, commanding lows and nice, crisp highs.

Here, the L/R outputs of a DL1608 mixer are connected directly to the channel A input of each

bottom SRM2850 subwoofer. The channel A full range output of each (bottom) SRM2850 subwoofer

is connected directly to the channel 1 input of each (top) SRM2850 subwoofer.

From here, the channel A high pass output of each (top) SRM2850 subwoofer is connected directly to the

channel 1 input of each SRM750 loudspeaker. Be sure that the gain knob on each is set to “line” or get

ready to be blasted! Select the SRM750 high pass mode on the SRM2850 for a matched system.

***Please note that the SRM750 loudspeakers are stacked on top of the SRM2850 subwoofers, not

pole-mounted. SRM750s may be pole-mounted on a tripod stand, but must be stacked on subwoofers.

SRM

650

SRM

750

VAR

POWER CONSUMPTION 200W

SRM

650

SRM

750

VAR

POWER CONSUMPTION 200W

SRM

650

SRM

750

VAR

POWER CONSUMPTION 200W

SRM

650

SRM

750

VAR

POWER CONSUMPTION 200W

SIG/OL SIG/OLSIG/OL SIG/OL

SRM

650

SRM

750

VAR

SIG/OLSIG/OL

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Daisy-Chaining Multiple SRM Loudspeakers

SIG/OLSIG/OLSIG/OLSIG/OLSIG/OLSIG/OLSIG/OLSIG/OL

DL806 Mixer

To next SRM

loudspeaker

input

To next SRM

loudspeaker

input

Main

Outs

Hookup Diagrams continued...

SRM loudspeakers may be daisy-chained via the male XLR connector labeled “THRU”. Simply plug the

signal source (i.e., mixer output) into the input jack(s), and patch that loudspeaker’s THRU jack to the

next loudspeaker’s input jack, and so on, daisy-chaining multiple SRM loudspeakers. Make sure that

the Ch 1 / Mix button is OUT [Ch 1]. See above for a visual representation of daisy-chaining.

Owner’s Manual

SRM Loudspeaker: Rear Panel Features

1. Power Connection

Thisisastandard3-prongIECpowerconnector.

Connectthedetachablepowercord(includedin 

thepackagingwiththeloudspeaker)tothepower

receptacle,andplugtheotherendofthepower 

cordintoanACoutlet.

MakesurethattheACpowerismatchedto

theACpowerindicatedontherearpanel

(belowtheIECreceptacle).

Disconnectingtheplug’sgroundpinis

dangerous.Don’tdoit!

2. Power Switch

Pressthetopofthisrockerswitchinwardstoturn

ontheloudspeaker.ThefrontpanelRunningMan

logowillglowwithhappiness...oratleastitwill

iftheloudspeakerispluggedintoasuitablelive

ACmainssupplyandthemainlogoswitch[10]

isdisengaged.

Pressthebottomofthisrockerswitchinwardstoturn

offtheloudspeaker.

Asageneralguide,SRMloudspeakersshould

beturnedonlast,afteranymixerorother

signalsource.Assuch,theyshouldalsobe

turnedoffrst.Thiswillreducethepossibilityofany

turn-onorturn-offthumpsandothernoisesgenerated

byanyupstreamequipmentfromcomingoutofthe

speakers.

3. XLR and 1/4" Combo Inputs

Bothchannelsfeature1/4"Wide-Z

™

inputswith

combojacksthatmayacceptbalanced/unbalancedXLR

and1/4"connections.ThegainrangeoftheWide-Z

inputsmayhandleanythingfromaninstrumentlevelto

ahigh-outputmicsignal.SimplyconnectanXLR,TRS

orTSconnectorintothechannelandadjustthegain

accordingly.

Pleasebeawareofthepositionofthegain

knob[4].

NEVERconnecttheoutputofanamplier

directlytotheinputoftheloudspeaker.

Thiscoulddamagetheinputcircuitry

oftheactiveloudspeaker.

Theyarewiredasfollows,accordingtostandards

speciedbytheAES(AudioEngineeringSociety):

Balanced XLR Input Connector

Pin1–Shield(ground)

Pin2–Positive(+orhot)

Pin3–Negative(–orcold)

SHIELD

COLD

HOT

SHIELD

COLD

HOT

Balanced XLR Input Connector

SIG/OLSIG/OL

POWER CONSUMPTION 200W

3 5 6

8 9 10

SRM550 • SRM650 • SRM750 Powered Loudspeakers

SRM Loudspeaker: Rear Panel Features continued...

Toconnectbalancedlinestotheseinputs,usea

1/4"Tip-Ring-Sleeve(TRS)plug.“TRS”standsfor

Tip-Ring-Sleeve,thethreeconnectionpoints

availableonastereo1/4"orbalancedphonejack

orplug.TRSjacksandplugsareusedforbalanced

signalsandstereoheadphonesandarewiredasfollows

accordingtostandardsspeciedbytheAES(Audio

EngineeringSociety):

Balanced 1/4" TRS Connector

Sleeve–Shield(ground)

Tip–Positive(+orhot)

Ring–Negative(–orcold)

Toconnectunbalancedlinestotheseinputs,usea

1/4"mono(TS)phoneplug,wiredasfollowsaccording

tostandardsspeciedbytheAES(AudioEngineering

Society):

Unbalanced 1/4" TS Connector

Sleeve–Shield(ground)

Tip–Positive(+orhot)

Formoreinformationontheseconnectors,see

AppendixBonpage20.

4. Gain Knobs

Thegainknobsadjusttheinputsensitivityofthe

micandmic/line/RCAinputs.Thisallowssignalsfrom

theoutsideworldtobeadjustedtorunthrougheach

channelatoptimalinternaloperatinglevels.

Thereis–

dBofgainwiththeknobfullydown

(off),rampingupto50dBofgainfullyup(max).

TheaccompanyingLEDwillilluminategreenwhen

thechannel’sinputsignalispresent,indicatingsignal.

Itwillremainlitsolongasthereissignalabove

–20dBupresentinthatchannel.

SLEEVE

TIP

SLEEVE

TIP

RING

TIP

SLEEVERING

Balanced 1/4" TRS Connector

SLEEVE

TIP

SLEEVE

TIP

SLEEVE

Unbalanced 1/4" TS Connector

TheaccompanyingLEDwillilluminateredwhenthe

amplierintheSRMloudspeakerisneartheclipping

point.ItisokayifthisLEDblinksoccasionally,because

thismeansthatthetransientpeaksarejustreaching

themaximumoutputoftheampliersandyouare

gettingthemostoutofyourloudspeaker.

Ifconnectingmixeroutputstoloudspeaker

inputs,setthegainknobto10:00[“Line”]

foroptimalsoundandperformance.

5. RCA Inputs [Channel 2 Only]

ThestereounbalancedRCAinputsallowyouto 

playaCDplayer,iPod

,orotherline-levelsource. 

TheRCAjacksacceptanunbalancedsignalusing

standardhi-[RCA]hookupcables.

NEVERconnecttheoutputofanamplier

directlytotheinputoftheloudspeaker.

Thiscoulddamagetheinputcircuitry

oftheactiveloudspeaker.

Theyarewiredasfollows,accordingtostandards

speciedbytheAES(AudioEngineeringSociety):

Unbalanced RCA Connector

Sleeve–Shield(ground)

Tip–Positive(+orhot)

 Formoreinformationontheseconnectors,see

AppendixBonpage20.

TIPSLEEVETIPSLEEVE

Unbalanced RCA Connector

SIG/OLSIG/OL

3 5 6

8 9 10

Owner’s Manual

SRM Loudspeaker: Rear Panel Features continued...

6. Thru Output

ThisisamaleXLR-typeconnectorthatproduces

exactlythesamesignalthatisconnectedtothe 

maininputjackoramixofchannels1and2.Useitto

daisy-chainseveralSRMloudspeakerstogetheroff

thesamesignalsource(s).

Theyarewiredasfollows,accordingtostandards

speciedbytheAES(AudioEngineeringSociety):

Balanced XLR Output Connector

Pin1–Shield(ground)

Pin2–Positive(+orhot)

Pin3–Negative(–orcold)

Seepage8tolearnmoreaboutdaisy-chainingSRM

loudspeakers.

Formoreinformationontheseconnectors,see

AppendixBonpage20.

7. Ch 1/Mix Switch [Thru Output]

Thisswitchallowsyoutochoosewhetheronly

thechannel1signal(pre-gain)issentouttothe

nextloudspeaker[switchout–Ch1]orifamix

ofthechannel1and2signalsaresentouttothe

nextloudspeaker[switchin–Mix](post-gains).

8. Speaker Mode

Hereyouareabletochangetheloudspeaker’s

speakermodetotailorittobestsuityourparticular

application.Therearefourmodesavailable:PA,DJ,

MonitorandSoloistwitheachSRM550andSRM650

andPA,DJ,FillandSpeechwitheachSRM750.

Pressthespeakermodebuttonrepeatedlyuntilthe

LEDofthespeakermodeyoudesireisilluminated.

RefertotheFrequencyResponsegraphsonpages

23–25forfurtherinformation.

PA Speaker Mode–Thismodeisfullrange,but

focusesonmid-rangeclaritywherevocalsoftenreside.

Thisistheplacetostartformostsoundreinforcement

applications.

DJ Speaker Mode–Thismodebumpsthelowsand

highswithamildtucktothemids,perfectformusic

playback.

SHIELD

COLD

HOT

SHIELD

COLD

HOT

Balanced XLR Output Connector

MON(itor) Speaker Mode–Thismodefeaturesa

lowfrequencyroll-offandareductionaround2kHzto

ensuremaximumgainbeforefeedbackinmonitor 

applications.

SOLO(ist) Speaker Mode–Thismodefeatures

alowfrequencyroll-offtogetridofunwantedthumps

andaddsboostandsparkletomid-rangeandhigh

frequencies.Thisplug-and-playmodeisperfectfor

singer-songwriters.

FILL Speaker Mode–Thismodefeaturesamild

lowfrequencyroll-offtoensureminimalonstagelow

frequencybuild-upwhileprovidingarichfullrange

responsewithplentyofmid-highcutthrough.This

plug-and-playmodeisperfectforonstagemonitorside

llapplications,aswellaswhenfacingaudienceareas

whereamainFOHrigwithsubwoofersispresent.

SPEECH Speaker Mode–Thismodefeaturesa

signicantlowfrequencyroll-offtogetridofunwanted

thumps.Italsoaddsboostandsparkletomid-rangeand

highfrequencies,criticalforspeechapplications.This

plug-and-playmodeisperfectforlargervenueapplica-

tionswherespeechistheprimaryaudiosourceinneed

ofclearandpreciseintelligibility.

9. Feedback desTROYer:

Themulti-bandfeedbackdestroyerhuntsdown

offendingfeedbackfrequenciesandappliesuptofour

notchltersautomaticallytodestroyfeedbackand

maximizegainpriortofeedback.Thisisagreattool

forperformerswithoutadedicatedengineer.

TheintegratedandamazinglyaccurateFeedback

Destroyerinstantlyemploysuptofourincredibly

narrow1/16thoctavelterstolocateanderadicate

feedbacksoyouknowyoucanperformfearlessly.

Plus,theentiresystemisprotectedbyourSmart

Protect

™

DSPwhichkicksintoprotectyour

investmentwhenthingsgetpushedalittletoohard.

SIG/OLSIG/OL

8 9 10

SRM550 • SRM650 • SRM750 Powered Loudspeakers

10. Main Logo Switch / Limit LED

TheRunningManlogoonthefrontoftheSRM

loudspeakerilluminateswhenthisswitchisdisengaged

andACpowerisavailableatthemainsinput[1].

EngagetheswitchifyoudonotwanttheRunning

Manlogotoilluminate.

SRMloudspeakershaveabuilt-inlimiterthat

helpstopreventtheamplieroutputsfromclipping

oroverdrivingthetransducers.Thelimitindicator

illuminatesyellowwhenthelimiterisactivated.

It’sokayforittoblinkyellowoccasionally,butif

itblinksfrequentlyorlightscontinuously,turndown

thegainknob[4]untilitonlyblinksoccasionally.

Excessivelimitingmayleadto

overheating,whichinturntripsthe

thermalprotectcircuitryandinterrupts

theperformance.See‘ThermalProtection’on

page13formoreinformation.

11. Extra Knobs, Buttons and LEDs

What’scoolerthanextrabellsandwhistleson

anewtoy?Well,alotofthings,Isuppose,butthat

didn’tstopus!TherearpanelofeachSRMloudspeaker

isstackedwithavarietyofextraknobs,buttonsand

LEDs.Thefollowingisalistofjustsomeofthefeatures

andfunctionsofeach(inalphabeticalorder):

Beer Tap–Whatgoodisaliveshowwithoutapintor

two...ormore?Simplypushandholdinthemomentary

switchuntilyourpintglassislled.

Liquor Tap–Noteveryoneisabeerdrinker.That’s

whyweinstalledthehandy-dandyliquortap,aswell.

Modem–Areyouoldenoughtorememberthesound

ofamodem?Pressthisswitchoncetohavethatsound

pouroutthespeakers.Pressthisswitchtwiceifyou

wouldratherhearthejoyfulsoundsofadot-matrix

printerinstead.

My Favorite Band–Pressthemyfavoriteband

buttonrepeatedlyuntilyourfavoritebandisdisplayed

onthesilkscreen.Whateversong(s)youplaythrough

theseloudspeakerswillsoundlikethebandyou

selected!

Sports–Musicandsportsdemandtwocompletely

differentsetsofsounds.IfusedasasportsPA,setthe

switchtosports.

SRM Loudspeaker: Rear Panel Features continued...

Stadium–Iftheaudienceconsistsofthebartender,

waitstaffandsignicantothers,engagethisswitch.

Inbetweensongsitwillsoundlikeastadiumlled

withadoringfansnearandwide,notcrickets.

Evenwithallthat,we’restilltryingtogureout

whatelseourcrazyengineerspackedintothesethings!

Themanualwillberevisedoncewe’vediscovered

whattheotherknobs,buttonsandLEDsdo.

Untilthen,appreciatethejoyofnewdiscoveries!

12. Rock ‘n Roll

Congratulations,youhavereachedtheend

ofthefeaturessection!Atthispoint,youshould

haveaprettygoodunderstandingofhowtheSRM

loudspeakersfunction.Ifthisistrue,thenextstepis

torock‘nroll!Ifthisisnottrue,headbacktopage9

andreaditalloveragain.Thefollowingpages

discussSRMloudspeakerplacement,roomacoustics,

anin-depthlookatriggingandSmartProtect,technical

informationandmore.Checkitout!

Owner’s Manual

Smart Protect

ThereareadvancedDSPprotectionmechanisms

designedtosafeguardtheloudspeakersandampliers

frominadvertentdamage.

Theprotectioncircuitsaredesignedto 

protecttheloudspeakersunderreasonable

andsensibleconditions.Shouldyouchoose

toignorethewarningsigns[e.g.excessivedistortion],

youcanstilldamagethespeakerbyoverdrivingitpast

thepointofamplierclipping.Suchdamageisbeyond

thescopeofthewarranty.

Limiting

Thedriverhasitsowncompressioncircuitwhich

helpsprotectitfromdamagingtransientpeaks. 

Thecompressorisdesignedtobetransparentand

isnotnoticeableundernormaloperatingconditions.

Overexcursion Protection

TheSRM550andSRM650usean18dB/octavehigh-

passlter,whiletheSRM750usesan24dB/octaveBut-

terworthhigh-passlterjustpriortothelow-frequency

amplier.Thispreventsverylowfrequenciesfrombeing

amplied.Excessivelow-frequencyenergycandamage

thewooferbycausingitto“bottomout,”alsoknowas

overexcursion,whichisequivalenttoamechanicalform

ofclipping.

Thermal Protection

Allampliersproduceheat.SRMloudspeakersare

designedtobeefcientbothelectricallyandthermally.

Intheunlikelyeventoftheamplieroverheating,

abuilt-inthermalswitchwillactivate,mutingthe

signal.

Whentheamplierhascooleddowntoasafe

operatingtemperature,thethermalswitchresetsitself,

andtheSRMloudspeakerresumesnormaloperation.

Ifthethermalswitchactivates,tryturningdownthe

levelcontrolanotchortwoonthemixingconsole(or

thebackoftheloudspeaker)toavoidoverheatingthe

amplier.Beawarethatdirectsunlightand/orhotstage

lightsmaybetheculpritofanamplieroverheating.

AC Power

BesuretheSRMloudspeakerispluggedintoan

outletthatisabletosupplythecorrectvoltagespecied

foryourmodel.Itwillcontinuetooperateatlower

voltages,butwillnotreachfullpower.

Besuretheelectricalservicecansupplyenough

amperageforallthecomponentsconnectedtoit.

Werecommendthatastiff(robust)supplyofAC

powerbeusedbecausetheampliersplacehigh 

currentdemandsontheACline.Themorepowerthatis

availableontheline,thelouderthespeakerswillplay

andthemorepeakoutputpowerwillbeavailablefora

cleaner,punchierbass.Asuspectedproblemof“poor

bassperformance”isoftencausedbyaweakACsupply

totheampliers.

Neverremovethegroundpinonthepower

cordoranyothercomponentoftheSRM

loudspeaker.Thisisverydangerous.

Care and Maintenance

Theseloudspeakerswillprovidemanyyears

ofreliableserviceifyoufollowtheseguidelines:

• Avoidexposingtheloudspeakerstomoisture.

Iftheyaresetupoutdoors,besuretheyare

undercoverifrainisexpected.

• Avoidexposuretoextremecold(below

freezingtemperatures).Ifyoumustoperate

theloudspeakersinacoldenvironment,warm

upthevoicecoilsslowlybysendingalow-level

signalthroughthemforabout15minutesprior

tohigh-poweroperation.

• Useadryclothtocleanthecabinets.Onlydo

thiswhenthepoweristurnedoff.Avoidgetting

moistureintoanyoftheopeningsofthe

cabinet,particularlywherethedriversare

located.

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Placement

WARNING:Installationshouldonlybedone

byanexperiencedtechnician.Improper

installationmayresultindamagetothe

equipment,injuryordeath.Makesurethatthe

loudspeakerisinstalledinastableandsecureway

inordertoavoidanyconditionsthatmaybedangerous

forpersonsorstructures.

Theseloudspeakersaredesignedtositonthe

oororstageasthemainPA,monitors[SRM550/

SRM650],orllspeakers[SRM750].Checktomake

surethatthesupportsurface(e.g.oor,etc.)hasthe

necessarymechanicalcharacteristicstosupportthe

weightoftheloudspeaker(s).

Theymayalsobepole-mountedviathebuilt-in

socketonthebottomofthecabinet.Besurethepole

iscapableofsupportingtheweightoftheloudspeaker.

Whenpole-mountingloudspeakers,besurethatthey

arestabilizedandsecuredfromfallingoverorbeing

accidentallypushedover.

TheSPM200isagreatoptionwhenusingan

SRMsubwoofer,asitallowsforgreaterextension

thanmostotherpolesavailablenorthoftheSouthPole.

PleasenotethatSRM750loudspeakers

shouldnotbepole-mountedviaSPM200.

Instead,itshouldbestackedontopofthe

subwoofer.Itishighlysuggestedthatstrapsareutilized.

Toreiterate,failuretofollowtheseprecautionsmay

resultindamagetotheequipment,personalinjury,

ordeath.

Theseloudspeakersmayalsobeownviaitsy

pointsasdetailedonpages16–17.Besuretoreadthe

PA-A2EyeboltInstallationInstructions,aswell.

TheseloudspeakersareNOTdesignedtoarray

horizontally.Ifyoufeelyoumustputtwospeakers

side-by-side,youshouldhaveagoodunderstanding

oftherelationshipbetweenthesplayangle(theangle

betweenthefacingsidesofthecabinets)andfrequency

cancellationeffectsbetweencabinets.

Whentwocabinetsarepositionedside-by-side

suchthattherear-angledfacesoftheenclosures

areparallel,thesplayanglewillbe90º.Thismatches

the90˚horizontalcoveragepatternofeachindividual

loudspeaker;theinterferencebetweenthetwocabinets

willbeminimized,butthetotalcoverageof180˚may

betoowideforsomeapplications.Themidandhigh

frequenciesmayalsobereducedforthoseinthecenter

whoaretooclosetotheloudspeakers.

Reducingthesplayanglewillreducethetotal

horizontalcoverage,butitalsocreatesanareaboth

speakersarecovering.Insteadofaneareldhole,

thiswillcausecomb-lteringeffectsinthefrequency

responseintheoverlappingarea.Thesmallerthesplay

angle,themoreenergywillbedeliveredon-axis,butthe

comb-lteringeffectswillgetworseatthesametime.

Toreiterate,though,westronglysuggest

NOTarrayingtheseloudspeakershorizontally.

Experimentationandexperiencewillhelpyound

therighttrade-offforyourapplication.

Owner’s Manual

Room Acoustics

SRMloudspeakersaredesignedtosoundfantastic

innearlyeveryapplication.

But,roomacousticsplayacrucialroleintheoverall

performanceofasoundsystem.Herearesome 

additionalplacementtipstohelpovercomesome 

typicalroomproblemsthatmightarise:

• Placingloudspeakersinthecornersofaroom

increasesthelowfrequencyoutputandcan

causethesoundtobemuddyandindistinct.

• Placingloudspeakersagainstawallincreases

thelowfrequencyoutput,thoughnotasmuch

ascornerplacement.However,thisisagood

waytoreinforcethelowfrequencies,ifso

desired.

• Avoidplacingthespeakersdirectlyona

hollowstageoor.Ahollowstagecanresonate

atcertainfrequencies,causingpeaksanddips

inthefrequencyresponseoftheroom.Itis

bettertoplacethemonasturdystanddesigned

tohandletheweightoftheloudspeaker.

• Positiontheloudspeakerssothehigh-

frequencydriversaretwotofourfeetabove

earlevelfortheaudience(makingallowances

foranaudiencethatmaybestanding/dancing

intheaisles).Highfrequenciesarehighly

directionalandtendtobeabsorbedmuch

easierthanlowerfrequencies.Byproviding

directline-of-sightfromtheloudspeakers

totheaudience,youincreasetheoverall

brightnessandintelligibilityofthesound

system.

• Highlyreverberantrooms,likemany

gymnasiumsandauditoriums,area

nightmareforsoundsystemintelligibility.

Multiplereectionsoffthehardwalls,ceiling,

andoorplayhavocwiththesound.Depending

onthesituation,youmaybeabletotakesome

stepstominimizethereections,suchas 

puttingcarpetingontheoors,closing

draperiestocoverlargeglasswindows,or

hangingtapestriesorothermaterialsonthe

wallstoabsorbsomeofthesound.

 However,inmostcases,theseremediesarenot

possibleorpractical.Sowhatdoyoudo?

Makingthesoundsystemloudergenerally

doesn’tworkbecausethereectionsbecome

louder,too.Thebestapproachistoprovideas

muchdirectsoundcoveragetotheaudience

aspossible.Thefartherawayyouarefrom

thespeaker,themoreprominentwillbethe

reectedsound.

 Usemorespeakersstrategicallyplacedsothey

areclosertothebackoftheaudience.Ifthe

distancebetweenthefrontandbackspeakers

ismorethanabout100feet,youshouldusea

delayprocessortotime-alignthesound.(Since

soundtravelsabout1footpermillisecond,it

takesabout1/10ofasecondtotravel100feet.)

Keepinmindthatthespeakermodeandfeedback

destroyeraretwogreatwaystocompensateforsomeof

theseissues.Seepage11formoreinformation[8,9].

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Rigging

SRMloudspeakersmaybeindividuallyown

usingaPA-A2EyeboltKit,partnumber0028272

[M10x1.5x37mmforgedshouldereyebolts].

WARNING:Installationshouldonlybedone

byanexperiencedtechnician.Improper

installationmayresultindamagetothe

equipment,injuryordeath.Makesurethatthe

loudspeakerisinstalledinastableandsecureway

inordertoavoidanyconditionsthatmaybedangerous

forpersonsorstructures.

WARNING:Thecabinetissuitableforrigging

viaitsypoints.NEVERattempttosuspend

anSRMloudspeakerbyitshandle.

Rigging Design Practices

Riggingaloudspeakerrequiresdetermining:

1.Theriggingmethodsandhardwarethatmeetstatic,

shock,dynamic,andanyotherloadrequirementsfor

supportingtheloudspeakerfromstructure.

2.ThedesignfactorandrequiredWLL(WorkingLoad

Limit)forthissupport.

Westronglyrecommendthefollowingriggingpractices:

1.Documentation:Thoroughlydocumentthedesign

withdetaileddrawingsandpartslists.

2.Analysis:Haveaqualiedprofessional,suchasa

licensedProfessionalEngineer,reviewandapprovethe

designbeforeitsimplementation.

3.Installation:Haveaqualiedprofessionalriggerdo

theinstallationandinspection.

4.Safety:Useadequatesafetyprecautionsand

back-upsystems.

Rigging Hardware and Accessories

Riggingourloudspeakerswillinvariablyrequire

hardwarenotsuppliedbyus.Varioustypesof

load-ratedhardwareareavailablefromavariety

ofthird-partysources.Thereareanumberofsuch

companiesspecializinginmanufacturinghardware

for,designing,andinstallingriggingsystems.Each

oneofthesetasksisadisciplineinitsownright.

Becauseofthehazardousnatureofriggingwork

andthepotentialliability,engagecompaniesthat

specializeinthesedisciplinestodotheworkrequired.

Wedooffercertainaccessoryriggingitemsandsome

ofthemmaybeusedwithavarietyofproducts.While

theseaccessoriesareintendedtofacilitateinstallation,

thewidevarietyofpossibleinstallationconditionsand

arraycongurationsdonotpermitustodeterminetheir

suitabilityorloadratingforanyparticularapplication.

Wearenotinthebusinessofprovidingcomplete

riggingsystems,eitherasdesigners,manufacturers,

orinstallers.Itistheresponsibilityoftheinstallerto

provideaproperlyengineered,load-certiedrigging

systemforsupportingtheloudspeakerfromstructure.

Rigging Notes

TheSRMloudspeaker’sintegralmountingpoints

aredesignedtosupportonlytheweightoftheirown

loudspeakerwithsuitable,externalhardware.This

meansthateachSRMloudspeakermustbesupported

independentlyofanyotherSRMloudspeakerandany

otherloads.Atleastthreeriggingpointsmustbeused

tohanganSRMloudspeaker.

3 Fly Points [SRM550 / SRM650]

MP=MountingPoint

MP MP

Top Rear

Owner’s Manual

10 Fly Points [SRM750]

Important Rigging Reminder:

Toreiterate,wearenotinthebusinessofproviding

completeriggingsystems,eitherasdesigners,

manufacturers,orinstallers.Itistheresponsibility

oftheinstallertoprovideaproperlyengineered,

load-certiedriggingsystemforsupportingthe

loudspeakerfromstructure.

TopFly

Points

RearFlyPoint

(adjustsangle)

*SRM750only

MP=MountingPoint

Left and RightBottom

Top

Rear

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Appendix A: Service Information

Poor bass performance

• Checkthepolarityoftheconnectionsbetweenthe

  mixerandtheloudspeakers.Youmayhaveyour

  positiveandnegativeconnectionsreversedatone

  endofonecable,causingoneloudspeakertobe

  out-of-phasewiththeother.

• Poorbassperformancemaybetheresultofbad

  ACpower.Seethesectiontitled‘ACPower’on

  page13forfurtherdetails.

Poor sound

• Isitloudanddistorted?Makesurethatyou’renot

  overdrivingastageinthesignalchain.Verifythat

  alllevelcontrolsaresetproperly.

• Istheinputconnectorpluggedcompletelyinto

  thejack?Besureallconnectionsaresecure.

Noise

• Whatisthepositionofthegainknob?Itshould

  beat(ornear)“mic”whenamicisconnected

  andat(ornear)“line”whenaline-levelsignal

  isconnected.Itshouldbe“off”forallunused

  inputs.

• Makesureallconnectionstotheactive 

  loudspeakersaregoodandsound.

• Makesurenoneofthesignalcablesarerouted

  nearACcables,powertransformers,orother

  EMI-inducingdevices.

• IstherealightdimmerorotherSCR-baseddevice

  onthesameACcircuitastheSRMloudspeaker?

  UseanAClinelterorplugtheloudspeakerinto

  adifferentACcircuit.

IfyouthinktheSRMloudspeakerhasaproblem,

pleasecheckoutthefollowingtroubleshootingtipsand

doyourbesttoconrmtheproblem.VisittheSupport

sectionofourwebsite(www.720trees.com)whereyou

willndlotsofusefulinformationsuchasFAQsand

otherdocumentation.Youmayndtheanswertothe

problemwithouthavingtopartwithyourloudspeaker.

Troubleshooting

No power

• Ourfavoritequestion:Isitpluggedin?Makesure

  theACoutletislive[checkwithatesterorlamp].

• Ournextfavoritequestion:Isthepowerswitch

  on?Ifnot,tryturningiton.

• IstheRunningManlogoonthefrontpanel 

  illuminated?Ifnot,makesuretheACoutlet

  islive.Ifso,referto“Nosound”below.

• TheinternalAClinefusemaybeblown.Thisis

  notauserserviceablepart.Ifyoususpectthe

  AClinefuseisblown,pleaseseethe"Repair"

  sectionnext.

No sound

• Istheinputgainknobfortheinputsource 

  turnedallthewaydown?Verifythatallthegain

  knobsinthesystemareproperlyadjusted.Look

  atthelevelmetertoensurethatthemixeris

  receivingasignal.

• Isthesignalsourceworking?Makesurethe 

  connectingcablesareingoodrepairandsecurely

  connectedatbothends.Makesuretheoutput

  levelcontrolonthemixingconsoleisturnedup

  sufcientlytodrivetheinputsofthespeaker.

• Makesurethemixerdoesnothaveamuteonora

  processorloopengaged.Ifyoundsomethinglike

  this,makesurethelevelisturneddownbefore

  disengagingtheoffendingswitch.

• Hasitshutdown?Makesurethereisatleast

  sixinchesoffreespacebehindeachSRM 

  loudspeaker.

Owner’s Manual

Hum

• Trydisconnectingthecableconnectedtothemain

  inputjack.Ifthenoisedisappears,itcouldbe

  a“groundloop,”ratherthanaproblemwiththe

  SRMloudspeaker.Trysomeofthefollowing 

  troubleshootingideas:

• Usebalancedconnectionsthroughoutyoursystem

  forthebestnoiserejection.

• Wheneverpossible,plugalltheaudioequipment’s

  linecordsintooutletswhichshareacommon

  ground.Thedistancebetweentheoutletsandthe

  commongroundshouldbeasshortaspossible.

Repair

Forwarrantyservice,refertothewarranty

informationonpage27.

Non-warrantyserviceisavailableatafactory-

authorizedservicecenter.Tolocatethenearest

servicecenter,visitwww.720trees.com,click“Contact

TechSupport”andselect“LocateaServiceCenter

orDistributor”[3].ServiceforSRMloudspeakersliving

outsidetheUnitedStatescanbeobtainedthroughlocal

dealersordistributors.

Ifyoudonothaveaccesstoourwebsite,youmaycall

theTechSupportdepartmentat1-800-898-3211,

Monday-Friday,duringnormalbusinesshours,Pacic

Time,toexplaintheproblem.TechSupportwilltellyou

wherethenearestfactory-authorizedservicecenteris

locatedinyourarea.

SRM550 • SRM650 • SRM750 Powered Loudspeakers

Balanced XLR Input Connector

EachSRMloudspeakerhastwofemaleXLR/TRS/TS

comboinputs.Besurethecablesarewiredper

AES(AudioEngineeringSociety)standards:

Balanced XLR Input Connector

 Pin1–Shield(Ground)

 Pin2–Positive(+orhot)

 Pin3–Negative(–orcold)

Balanced XLR Output Connector

ThereisalsoamaleXLRoutputoneachSRM

loudspeakerlabeled“THRU”.Besurethecablesare

wiredperAES(AudioEngineeringSociety)standards:

Balanced XLR Output Connector

 Pin1–Shield(Ground)

 Pin2–Positive(+orhot)

 Pin3–Negative(–orcold)

SRMloudspeakersmaybedaisy-chainedviathemale

XLRconnectorlabeled“THRU”.Simplyplugthesignal

source(i.e.,mixeroutput)intotheinputjack(s), 

andpatchthatloudspeaker’sTHRUjacktothenext

loudspeaker’sinputjack,andsoon,daisy-chaining

multipleSRMloudspeakers.Seepage8foravisual

representationofdaisy-chaining.

Balanced XLR Input Connector

SHIELD

COLD

HOT

SHIELD

COLD

HOT

Balanced XLR Output Connector

SHIELD

COLD

HOT

SHIELD

COLD

HOT

Balanced 1/4" TRS Connector

TRSstandsforTip-Ring-Sleeve,thethreeconnections

availableonastereo1/4"cable.Thisallowsfora

directconnectiontothechannel1and2inputjacks

onSRMloudspeakers.Besurethecablesarewiredper

AES(AudioEngineeringSociety)standards:

Balanced 1/4" TRS Connector

 Sleeve–Shield(Ground)

 Tip–Positive(+orhot)

 Ring–Negative(–orcold)

Unbalanced 1/4" TS Connector

TSstandsforTip-Sleeve,thetwoconnections

availableonamono1/4"cable.Thisallowsfora

directconnectiontothechannel1and2input

jacksonSRMloudspeakers.Besurethecablesare

wiredperAES(AudioEngineeringSociety)standards:

Unbalanced 1/4" TS Connector

 Sleeve–Shield(Ground)

 Tip–Positive(+orhot)

Unbalanced RCA Connector

RCA-typeplugs(alsoknownasphonoplugs)

andjacksareoftenusedinhomestereoandvideo

equipmentandinmanyotherapplications.RCAplugs

areunbalanced.Connectthesignaltothecenterpost

andtheground(earth)orshieldtothesurrounding

“basket.”BesurethecablesarewiredperAES(Audio

EngineeringSociety)standards:

Unbalanced RCA Connector

 Sleeve–Shield(Ground)

 Tip–Positive(+orhot)

SLEEVE

TIP

SLEEVE

TIP

RING

TIP

SLEEVERING

Balanced 1/4" TRS Connector

SLEEVE

TIP

SLEEVE

TIP

SLEEVE

Unbalanced 1/4" TS Connector

TIPSLEEVETIPSLEEVE

Unbalanced RCA Connector

Appendix B: Connections

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Mackie 650 User manual

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