Dayton Audio DTA-100LF User manual

Model: DTA-100LF User Manual

DESKTOP

LOW-FREQUENCY

AMPLIFIER WITH EQ

1. Readtheseinstrucons.

2. Keeptheseinstrucons.

3. Heed all warnings.

4. Followallinstrucons.

5. Donotusethisapparatusnearwater.

6. Cleanonlywithadrycloth.

7. Donotblockanyvenlaonopenings.Installinaccordancewiththemanufacturer’sinstrucons.

8. Donotinstallnearanyheatsourcessuchasradiators,heatregisters,stoves,orotherapparatus

(includingampliers)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

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

10. Protectthepowercordfrombeingwalkedonorpinchedparcularlyatplugs,conveniencerecepta-

cles,andthepointwheretheyexitfromtheapparatus.

11. Onlyuseaachments/accessoriesspeciedbythemanufacturer.

12. Useonlywiththecart,stand,tripod,bracket,ortablespeciedbythemanufacturer,orsoldwith

theapparatus.Whenacartisused,usecauonwhenmovingthecart/apparatuscombinaonto

avoidinjuryfromp-over.

13. Unplugthisapparatusduringlightningstormsorwhenunusedforlongperiodsofme.

14. Referallservicingtoqualied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ob-

jectshavefallenintotheapparatus,theapparatushasbeenexposedtorainormoisture,doesnot

operatenormally,orhasbeendropped.

15. Theapparatusshallnotbeexposedtodrippingorsplashingandthatnoobjectslledwithliquids,

suchasvases,shallbeplacedontheapparatus.

16. CAUTION:Servicinginstruconsareforusebyqualiedservicepersonnelonly.Toreducetheriskof

electricshock,donotperformanyservicingotherthanthatcontainedintheoperanginstrucons

unlessyouarequaliedtodoso.

17.

WARNING:Toreducetheriskofreorelectricshock,donotexposethisapparatustorainormoisture.

18. Whereanappliancecouplerisusedasthedisconnectdevice,thedisconnectdeviceshallremain

readilyoperable.

CAUTION:Toreducetheriskofelectricshock,donotremove

cover(orback).Nouser-serviceablepartsinside.Referservicing

toqualiedservicepersonnel.

Explanaon of Graphical Symbols

Thelightningashwitharrowheadsymbol,within

anequilateraltriangle,isintendedtoalertyoutothe

presenceofuninsulated“dangerousvoltage”within

theproduct’senclosurethatmaybeofsucientmag-

nitudetoconstuteariskofelectricshocktopersons.

Theexclamaonpointwithinanequilateraltriangle

isintendedtoalertyoutothepresenceofimportant

operangandmaintenance(servicing)instruconsin

theliteratureaccompanyingtheproduct.

Important Safety Instrucons

Introducon

ThankyouforpurchasingtheDaytonAudio®DTA-100LFlow-frequencydesktop

amplier;oneofthemostversaleandcompactsubwooferampliersavailable.

Thecompactdesignisperfectforfocusedapplicaonwherespaceisatapremium,

whilethein-depthEQandcrossoverallowtheampliertobecustom-tailoredto

suitthelisteningenvironment.

Features

• Compactdesktopsize,perfectforbigsoundfromasmallpackage

• Adjustablelowpassfrequencyandphasecontrolforpreciseintegraon

• Subsoniclterforincreasedcontrolandsubwooferprotecon

• Alowfrequency,fullyadjustablePEQbandallowsforbasstobeadjustedto

yourpreference,orforcungdownonanoverpoweringroommode

• Automacturnon/oforsetitandforgetoperaon

• Builtinpowersupplywithautomac110/220Vinputvoltageswitching

What’s Included

1xDTA-100LFamplier

2xMounngbrackets

1xACpowercord

1xUsermanual

Installaon

TheDTA-100LFcanbeconvenientlymountedontoorunderneathashelfordesk

withtheincludedmounngbrackets.Thebracketscanbeaachedtothesideof

theamplierbyremovingthescrewsonthesidesoftheamplierwithaPhillips

screwdriverandreplacingthemwiththebracketsinplace.

Donotblockthesidevents.EventhoughtheDTA-100LFwilltypicallyruncool,

thesideventsallowairtocirculatethroughthechassis.Donotblockthevents

foranyreason.

IMPORTANT! DO NOT BLOCK VENTS!

DTA-100LF

Shelf

Front Panel

1. Gain -Setstheoverallleveloftheamplier,whichisusedtomatchtheoutputofthe

subwoofertotherestofthespeakersinthesystem.Gainadjustmentdoesnotaectline

outpass-throughlevel.

2. Low Pass Frequency Adjustment -Adjuststhe24dB/octlow-passcrossover

frequencyfrom30Hzto200Hz.Thisadjustmentwillallowyoutoproperlyintegrate

thesubwooferwithmainorsatellitespeakers.Itisrecommendedtoexperimentwith

dierentsengsunlthesmoothesttransionbetweensubwooferandspeakersis

achieved.Ifyouareusingasourcethatalreadycreatesalowpassed,linelevel(RCA)

subwooferoutput(likeasuboutjackonareceiver),itisimportantthatyouonlyuse

thelowpasslteradjustmentonthereceiverorontheDTA-100LFtoavoidinteracon

betweentheselters.Ifyouchoosetouseyourreceiver’slowpasslteradjustment,set

theFREQknobontheDTA-100LFtoitsmaximumsengof200Hz.

3. Phase -Thephaseadjustmentdialallowsyoutocompensatefordierencesin

theacouscalandelectricalcharacteriscsbetweenthesubwooferandthemain

systemspeakers.Therelavelocaonsofspeakersinthesystemcancausesignicant

disturbancesinspeakerinteraconduetomedelayissues,orthedestrucvephase

interferencesthatcanoccuratcertainfrequencies.Experimentaonwiththisdialin

conjunconwithalteringthelocaonofthesubwoofercandramacallyimprove

systemintegraon.

4. Power LED -Theampliercanbeturnedonbyeitherthemainpowerswitchor

AUTOON.WhentheindicatorLEDisred,theamplierisinstandbymode.Whenthe

LEDisblue,theamplierisfullyacve.

5. EQ -TheEQadjustmentknobsenablesyoutocustom-tailoronebandofparametric

equalizaonfortheirsubwoofer,whichcanbeusedtoaddboosttothelow-endofthe

response,orcanbeusedtocutoutanexcessivelyloudroomresonance.TheFREQknob

selectsthefrequencyforthelterbetween10to80Hz.Thebandwidthknobselectshow

wideornarrowthelteris(thehigherthebandwidth,thebroadertheeect).Thelevel

knobcanbeusedtoaddupto5dBofboostor11.5dBofcut.

PHASE

POWER

90°

0° 180°30Hz 200Hz

105Hz

0 10

FREQGAIN

10 80

25 73

39 60

46 53

32 67

FREQ BANDWIDTH LEVEL

-11.5 +6

-12.5 4.5

-7 0

-5 -2

-10 2.5

0.1 1

0.5

LOW PASS EQ

DTA-100LF

Rear Panel

1. Auto On -TheampliercansensesignalsontheRCAline-levelinputsand

automacallyacvatetheamplier.(pg.6)

2. EQ -ThesinglebandEQsetonthefrontpanelcanbedeacvatedbycompletely

removingitfromthesignalpath.EnablingtheEQfunconwilldroptheoveralloutput

leveloftheamplierby6dB.Thisistoallowuptoa6dBboostusingtheEQknobs

withouttheriskofover-drivingtheamplier.

3. Line Output -StereoRCAjacksallowthelinelevelstereoinputsignaltobeoutput

tootheraudioequipment.Thisfullrangesignalmirrorstheaudioontheinputandis

notsummedtomonooraectedbythegain,EQ,lowpasslter,phase,orsubsonic

lteradjustments.

4. Line Input -StereoRCAjacksreceivetheaudiosignalfromstandardline-levelaudio

sources.Whenpossible,boththeleandrightaudioinputsshouldbeconnectedand

areinternallysummedtoamonooutput.IfusingamonoRCASUBOUToranother

monoinputsource,simplyconnectittotheLEFTRCAinputandleavetheRIGHTRCA

inputdisconnected.

5. Subsonic Filter -Adjuststhe12dB/octhigh-passlterfrom0Hzto100Hz.Thishelps

removesubsonicinformaonfromthesignalandghtenthelow-endresponseofsome

subwoofersystems.Thiscanbeparcularlyusefulforprotecngportedsubwoofersystems.

6. Speaker Output -Speakerleveloutputconneconscarrytheampliedsignaltoa

passivesubwooferorbassshaker.Theincludedterminalscanacceptbarewire,spade

plugs,orbananaplugs.TheminimumratedloadfortheDTA-100LFoutputis4ohms.

7. AC Power -TheDTA-100LFiscapableof110Vand220Voperaon.Theinternalpower

supplycanautomacallysensethepowerinputandoperateappropriately;simply

connecttheappropriateACpowercordtoyourwalloutlet.

8. Power Switch -Therearpanelpowerswitchturnstheamplieronando.Whenthe

frontpowerindicatorisred,theamplierisinstandbymode.WhentheLEDisblue,the

amplierisfullyacve.

OUT PUT

LINE OUT LINE IN

4Ω MIN

OFF

POWER

FREQ

SUBSONIC FILTER

OFF 100Hz

50Hz

DTA-100LF

Desktop Low-Frequency Amplifier

AC 100V~240V

50Hz/60Hz

OFF ON

AUTO ON

OFF ON

Connecons

Input -UsingastereoormonoRCAcable,connecttheLFEOUT,SubOUTor

otherlinelevelaudiooutputtotheDTA-100LF’sLINEIN.SincetheLINEOUT

sendsafullrangeaudiooutputandisnotaectedbythebuiltinEQ,crossover,

orsubsonicltertheDTA-100LFcanbeplacedeitherbeforeoraerafullrange

amplierorpoweredspeakers.

Output -Using16AWG(minimum)2-conductorstrandedspeakerwirestrip

approximately1/2″ofshieldingfromeachendandtwisttogethersothatthere

arenoloosestandsthatcancauseshortsanddamagetheamplier.Withthe

amplierpoweredoconnectthepreparedwiretotheappropriate+and-

terminalsonboththeamplierandanunpoweredsubwoofer.Verifythatthe

ampandsubwooferareconnectedusingthesamepolaritytoexperiencethefull

poweroftheDTA-100LF.

Operaon

Power -TopowerontheDTA-100LFtogglethePOWERON/OFFswitch.Ifthe

AUTO-ONswitchis“o”theamplierwillbeginworkingimmediately.

Automac Power Sensing -TheAUTOONfeatureishandywhenusingtheDTA-

100LFinconjunconwithotheraudioequipmentandcanautomacallyturnon

whenaudioisdetected.Whenan8mVsignalisdetectedontheRCAinputsthe

amplierturnsfromSTANDBYtoONmode.Theamplierwillautomacallyenter

STANDBYwhennoaudiohasbeendetectedforeenminutes.

Crossover -Thelowpasslteradjustmentsetsthefrequencyatwhichaudio

contentwillpasstotheDTA-100LFSpeakerOutput.Alowpassltermeansthat

thefrequenciesbelowthetargetfrequencywillbeunaected,andthehigher

frequencieswillberemoved.Removinghigherfrequencieswillallowtheamplier

andconnectedsubwoofertoproducecleardistoron-freeaudio.Adjustthelow

passlterfrequencybetween30Hzto200Hzsothereisanaturalsounding

transionfromthemainspeakersandtheconnectedsubwoofer.Thisvaluewill

changedependingonthesizeofthespeakersandsubwooferbeingused.

Phase -Thephasesengisusedtocompensateforthesubwoofer’slocaon

relavetothemainspeakers,andcreateasmoothertransionfromthemain

speakerstotheconnectedsubwoofer.

Specicaons

MaximumOutputPower ......................................................70W/8Ω;100W/4Ω

THD ....................................................................................... 1%

FrequencyResponse ............................................................20Hz-180Hz+/-3dB

SignaltoNoiseRao .............................................................95dB

InputSensivity .................................................................... 200mV

LowPassCrossoverRange ....................................................30Hz-200Hz

PhaseAdjustment ................................................................0°-180°

LineInputImpedance ........................................................... 22kΩ

LineOutImpedance .............................................................4kΩ

PowerInputVoltageRange ..................................................100-240VAC

StandbyPower .....................................................................1.8W

MaxPowerConsumpon .....................................................150W

Dimensions ...........................................................................7.5″x2″x5.5″

OverallLength(includingknobsandconnectors) ................8.74″

Weight ..................................................................................3.3lbs.

Dayton Audio®Last Revised: 6/22/2021

daytonaudio.com

tel + 937.743.8248

info@daytonaudio.com

705 Pleasant Valley Dr.

Springboro, OH 45066

USA

5-Year Limited Warranty

See daytonaudio.com for details

Dayton Audio DTA-100LF User manual

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