Octet Matrix Audio DW4416-DW50 User manual

Octet Matrix Audio

DW4416-DW50 Wireless System

User’s Guide

Page 2

Table of Contents

Introduction ........................................................................................................ 3

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

Specifications ...................................................................................................... 4

System Installation ............................................................................................. 4

System Setup Flow Chart ..................................................................................... 5

Wireless System Testing ...................................................................................... 6

Transmitter ....................................................................................................................... 6

Wireless Speakers/Wireless Amplifier ................................................................................ 6

Testing the System............................................................................................................. 6

Component Installation ...................................................................................... 6

DWT4416 Transmitter Mounting ........................................................................................ 7

DWA4416-50 Amplifier Placement/Mounting .................................................................... 8

Final Verification & Optimization ........................................................................ 8

Channel & Phase Verification ............................................................................................. 8

Dynamic Range Optimization ............................................................................................. 9

Highest Output Source ...................................................................................... 10

Maximum System Level .................................................................................... 10

Maximum System Level Using 0 dBFS, 1 kHz Signal ........................................................... 11

Maximum System Level Using Source Material ................................................................ 12

Troubleshooting Guide ...................................................................................... 13

FCC Statement .................................................................................................. 14

Warranty .......................................................................................................... 14

Resources .......................................................................................................... 14

Page 3

Introduction

Thank you for purchasing the Octet Matrix Audio DW4416-50 wireless amplifier system.

Please read through the entire manual before attempting to install your wireless system.

Wireless setup & operation can sometimes be problematic, but by following the guidelines in

this manual, you should have your system up and running optimally with few problems.

Features

Octet Matrix Audio has set the standard for wireless amplification by integrating

uncompressed CD quality wireless audio transmission with high efficiency Class T

amplification in convenient, easy to use systems. Utilizing the 5.8 GHz wireless band, the

DW4416-50 wireless speaker system offers trouble free operation in most home

environments.

The Octet Matrix Audio DW4416-50 wireless amplification system provides the following

class leading features:

44.1 kHz/16 bit uncompressed digital audio for CD quality wireless audio transmission.

Completely independent right and left amplifiers with integrated wireless receiver and

50 watt RMS class T amplifier (100 watts RMS total).

Minimizes interference possibilities by operating in the less crowded 5.8 GHz wireless

band.

Wireless audio link produces less than 1 millisecond latency (delay) making the

DW4416-50 wireless amplifiers ideally suited for use in home theater systems. Other

wireless systems can have as much as 30 milliseconds latency, making them unusable

in many home theater installations.

High efficiency Class T amplifier delivers 50 watts RMS at less than .04% THD with very

little excess heat generation. Class T amplifier architecture provides high definition

audio performance while operating at class D amplifier efficiency.

Exclusive Octet Matrix Audio wireless setup CD confirms proper system setup and

allows users to optimize wireless system dynamic range.

Page 4

Specifications

System Installation

System installation consists of the following steps:

1) Determine system configuration using the System Setup Flow Chart.

2) Determine desired primary component locations and connect system components.

3) Test system for wireless stability.

4) Troubleshoot system set up, if necessary.

5) Install components in primary location. The speakers can be moved, but may require

wireless troubleshooting in each new location.

6) Confirm system operation and optimize wireless dynamic range.

Following the System Installation steps in this order will provide a trouble free system

installation with optimized performance, and no drywall repairs!

Digital Wireless System

Transmission frequency 5.8 GHz

Transmission method PCM digital audio

Transmission data rate > 3 MBPS

Audio sampling rate 44.1 kHz

Audio bit depth 16 bit

Audio sampling method 128 times oversampling

Error correction 1/2 rate FEC

Signal to noise ratio - A weighted 91 dB typical

Dynamic range 91 dB typical

Audio latency < 1.0 ms

Transmission range

Typically 50 ft. indoors through walls & ceilings

(non metallic)

Amplifier

Frequency response 7 Hz - 22 kHz

Amplifier power output - 8 ohm load 50 watts RMS

THD @ 1 kHz, 50 watts 0.04%

Power efficiency 85% typical

Channel separation 94 dB typical

Mechanical

Wireless amplifier dimensions (ea.)

3-3/4" wide x 1-1/2" tall x 5-3/4" deep

(95mm x 38mm x 146mm)

Transmitter dimensions

7-1/2" wide x 1-3/4" tall x 6-3/4" deep

(191 mm x 45mm x 172mm)

Shipping weight (system) 3.5 lbs. (1.59 kg)

Shipping dimensions (system)

8-1/2" wide x 10-1/4" deep x 6" tall

(216mm x 260mm x 152mm)

Warranty 2 Years

Page 5

System Setup Flow Chart

1) Choose Source, based on output type, from group 1 or 2.

2) Choose receiver/amplifier output from 1a, 1b, 2a, 2b, or 2c.

3) Hook up receiver/amplifier output chosen in step 2 to the DWT4416 input indicated.

4) Follow the steps in System Testing.

Digital Source

Blu-ray player, DVD player,

CD player, or PC

soundcard

with HDMI, Digital Optical, or

Digital Coaxial output

Receiver/Amplifier

HT Receiver, Audio amplifier

without variable level RCA outputs

DWT4416 RCA

Input

DWT4416

Speaker Level

Input

Receiver/Amplifier

HT Receiver, Audio amplifier

with variable level RCA outputs

Analog Source

MP3 player, iPod, iPhone,

DVD player, CD player, or

PC soundcard

with stereo phono plug or RCA

analog output connectors

Receiver/Amplifier

HT Receiver, Audio amplifier

without variable level RCA outputs

DWT4416 RCA

Input

DWT4416

Speaker Level

Input

Receiver/Amplifier

HT Receiver, Audio amplifier

with variable level RCA outputs

OR Do not connect

both input types

Go to

Wireless

System

Testing

Section

DWT4416 RCA

Input

Do not connect

both input types

Page 6

Wireless System Testing

Follow the instructions here prior to calibrating the system. This will allow you to confirm

proper wireless operation with the components in their intended primary locations. If

problems are found in this step, follow the Troubleshooting Guide to resolve the issues

before continuing with installation. Please follow these instructions prior to drilling any holes

or permanently mounting any components.

Transmitter

The DWT4416 transmitter can be placed anywhere convenient. However, it should not be

placed on top of other devices that generate large amounts of heat such as receivers,

amplifiers, DVRs, etc. Keyhole patterns on the bottom of the transmitter case allow the

DWT4416 to be mounted on a wall, or on the side or back of a home entertainment system

cabinet.

Rotate the DWT4416 transmitter volume knob to its centered position (straight up). Connect

the system components as determined with the System Setup Flow Chart and connect the

power supply first to the transmitter and then into the wall outlet. Place the transmitter in,

or near, the desired primary location.

Wireless Speakers/Wireless Amplifier

Temporarily place the DWA4416-DW50 amplifiers and connect them to your speakers in or

near the desired final positions. The locations must be close to power outlets. Rotate the

DWA4416-50L & DWA4416-50R volume knobs to the centered position (straight up).

Testing the System

After the components are set up as described above, play some audio source material

through the system at a low to moderate level. DO NOT USE THE OCTET MATRIX AUDIO

SETUP CD FOR THIS STEP! YOU MAY DAMAGE EQUIPMENT, YOUR HEARING, OR BOTH.

The first time you operate the system, it may take a moment or two for the wireless link to

establish a solid connection. Once the wireless connection is established, confirm that the

system operates correctly without audio dropouts or crackling. If the system does exhibit any

of these problems, use the troubleshooting charts to resolve the issue before continuing.

Component Installation

You are now ready to mount, or place, the system components. If you will be mounting to

walls, try to screw into wooden studs. If you can’t locate studs suitable for your installation,

Page 7

use wall anchors capable of holding the weight of the component. If you don’t have a stud

finder, mark the desired location and drill a test hole with a drill the same diameter as the

screw body you would use to attach to a stud. If you hit a wood stud, then use the holes and

screw directly into the stud. If you don’t hit wood, drill out the same holes with a drill

diameter specified for your wall anchors and install and screw into the wall anchors.

DWT4416 Transmitter Mounting

If you choose to mount the transmitter, print out this page. Make sure that Page Scaling in

the print settings is set to “none”. If the planned mounting space is tight, use scissors to cut

around the template outline and position the template exactly where the DWT4416

transmitter will be mounted. Use a nail, screw tip, or other sharp object to mark the wall or

other mounting surface by puncturing the paper at the two crosshairs. Fasten screws to a

stud or anchors leaving approximately ” gap between the wall and the bottom of the screw

head.

Page 8

DWA4416-50 Amplifier Placement/Mounting

The “L” or “R” appended to the end of the model number indicates which channel that

amplifier will receive wirelessly from the transmitter. The DW4416-50 wireless amplifiers can

be placed on top of speakers, on any flat, stable surface, or attached to speakers with

provided hook & loop fastening system. Each DW4416-50 wireless amplifier must be located

near a power outlet.

Final Verification & Optimization

You will use the Octet Matrix Audio Setup CD for the final verification and optimization step.

If the transmitter and speakers will be located in different rooms, we recommended that you

temporarily set up the DW4416-50 wireless amplifiers, connected to speakers, near the

DWT4416 transmitter location. Actual speaker location is not important, but they should be

directed towards the transmitter so you can easily hear them while confirming setup and

adjusting the DWT4416 transmitter.

The test tracks on the Octet Matrix Setup CD are:

1) Introduction

2) Left-Right Channel Identification

3) Left-Right channel phase confirmation

4) Track 5 warning

5) 1 kHz tone, 0 dBFS

Channel & Phase Verification

1) Set the volume controls on the DWT4416 and DW4416-50 amplifiers to 12:00 (straight

up). Turn or set the volume control on the source, receiver, or amplifier to 9:00 (¼

volume). Make sure that any distance and/or delay settings are disabled or set to the

same value for both the Left & Right channels.

2) Insert the Octet Matrix Audio set up CD into a CD player, DVD player, or Blu-ray

player. If the CD doesn’t start playing automatically, point the player to track 1 and

then hit play. When the Octet Matrix Audio Setup CD introduction starts, adjust the

source, receiver, or amplifier volume to a comfortable listening level.

3) Track 2 is a channel identification track and will alternate between spoken “Left

channel” and “Right channel” routed only to the respective channels. Confirm that

“Left channel” is coming from the DW4416-50L and that “Right channel” is coming

from the DW4416-50R.

4) If the channels are reversed, check the wiring into the DWT4416 transmitter and re-

route the wires if necessary. If the wiring to the transmitter is correct, check all other

system wiring and fix any incorrect channel routing.

Page 9

5) Track 3 is a phase verification track to confirm that speaker to speaker phase is

correct. To use this track effectively, you should be centered between the speakers

and 3' - 5' away. The track alternates several times between the spoken phrase “In

phase” followed by pink noise played in phase, and “out of phase” followed by pink

noise played out of phase. Both the voice introduction and the pink noise will be

either in phase or out of phase.

6) When everything is set up correctly, you should hear:

a. In Phase - the voice and the pink noise will have a clearly defined point of

origin centered between the speakers.

b. Out of Phase - the voice and pink noise will have no clearly defined origin and

may even sound as if the sound originates outside of the speakers.

c. There will also be a distinct difference in bass levels with the pink noise. The

pink noise will sound fuller (more bass) when in phase, and thinner (less bass)

when out of phase.

7) If you hear the opposite effects, check the wiring into the DWT4416 transmitter and

from the wireless amplifiers to the speakers. In some cases, the equipment setup or

environment can cause confusing results. If the wiring seems correct, try moving your

listening position towards the speakers and move slightly to one side of center, listen,

and then move slightly to the other side of center and listen. If you still don’t hear

what you think you ought to, try reversing only the left DWT4416 input wire polarity

and perform the phase test again.

Dynamic Range Optimization

1) If this wireless system is being added to an existing audio system, use one of the

techniques found in the Maximum System Level section to determine the usable

system level before going to step 2. If this wireless system will be used alone (without

other speakers), continue to step 2.

2) If you have several sources (CD player and DVD player, for example), you must use the

source with the highest analog output for a given signal. See the section titled Highest

Output Source for the procedure to determine which source has the highest output.

3) Set the DWT4416 volume control to the 9:00 position.

4) Confirm that both DWA4416-50 volume controls are at the 12:00 position.

5) Disconnect all other speakers and set the Main System Volume control to the

Maximum System Level determined in step 1. Skip this step if not adding on to an

existing audio system.

6) Place the Octet Matrix Audio test CD into the source selected in step 1 and select track

5 (or select the 0 dBFS track copied to MP3 player, iPod, iPhone, etc).

Page 10

7) Adjust DWT4416 volume control up until you hear distortion. The onset of distortion

will be obvious, with a clear transition point. Back the DWT4416 volume control off

slightly until the distortion disappears. This setting should not have to be changed

again unless system component changes are made.

Highest Output Source

1) You should have a voltmeter or a computer with a soundcard* in order to determine

which source has the highest output level for a given input signal. You do not need a

calibrated measurement system because you only need to determine the relative

output of each source with a known signal (the Octet Matrix Audio 0 dBFS test tone).

If you have a voltmeter, play track 5 through each source and measure the voltage at

the source output. The source output that registers the highest voltage is the source

you should use for the dynamic range optimization setup. If you do not have a

voltmeter, you can download one of the audio level meters in the Resources section

to a computer with a soundcard (preferably a laptop) and connect the source outputs

to the soundcard input to determine the highest analog output.

2) If you want to skip the technical nonsense and trust your ears, make a copy of the

Octet Matrix Audio Test CD and play Track 5 in two sources at the same time. Set the

Main System Volume to ¼ volume and switch the source selector from one source to

the other to determine which source sounds louder for a given Main System Volume

setting. The source with the highest output should be used for Dynamic Range

Optimization.

* Any AC voltmeter or PC soundcard will do. You will be measuring sine waves and are interested in relative levels, so it

doesn’t matter if your meter is an RMS responding meter or an average responding meter, or even if it’s out of calibration. If

none of this makes sense to you, don’t worry. The relative values you measure with anything other than a truly broken

meter or soundcard will give you the results you need.

Maximum System Level

When adding wireless amplifiers/speakers to an existing system, the Maximum System Level

must be determined prior to optimizing the wireless system dynamic range. This step is the

most difficult because it relies on assessment of distortion levels through listening. The 0dBFS

1 kHz test signal ensures that the source (CD player, DVD player, Blu-ray player, PC soundcard,

or MP3 player) is outputting its maximum analog level. The difficulty comes when that analog

signal is amplified through a receiver or amplifier. We may want to set the receiver or

amplifier volume all the way up, believing that this should be the Maximum System Level.

The problem with this approach is that with most source output levels, almost no receiver or

amplifier will output a clean, undistorted signal when set to its full output. Without

specialized test equipment, the Maximum System Level must be determined by listening and

use of a suitable source signal. Two approaches are provided for determination of the

Maximum System Level: using the 0 dBFS test signal, and through use of several selections of

Page 11

source material. You will use your existing amplifier and speakers to determine the Maximum

System Level. The wireless amplifiers/speakers are not used for this procedure.

Maximum System Level Using 0 dBFS, 1 kHz Signal

The most accurate approach is to play the 0dBFS 1 kHz test signal through the existing system

using hearing protection (over the ear or earplugs) while slowly adjusting the Main System

Volume until you hear distortion. Using this approach poses some risk of damage to your

existing equipment, and depending on the power of your main system, to your hearing.

In order to use this method, you must:

1) Confirm that your current speaker’s power rating matches or exceeds the power

output rating of your existing amplifier or receiver.

2) Use hearing protection while performing the test.

3) Ensure that there are no living creatures (that you care about) in the same room or

without at least 2 walls of separation between them and the sound system. If so, they

must also use hearing protection.

Under no circumstances should the main system volume be turned up for more than a

few seconds beyond the point at which significant distortion is heard. DO NOT USE THIS

TECHNIQUE WITHOUT HEARING PROTECTION. OCTET MATRIX AUDIO IS NOT

RESPONSIBLE FOR EQUIPMENT OR HEARING DAMAGE USING THIS TECHNIQUE. IF IT

HURTS, DON’T DO IT!

Using this technique, you will hear two types of harmonic distortion:

1) Distortion that occurs in all loudspeakers. Even in loudspeakers with high distortion

levels, the distortion increases reasonably linearly with power. You do not need to be

concerned about damage from loudspeaker distortion for short periods of time.

2) Distortion from amplifier clipping when pushed beyond its ability to amplify cleanly.

Distortion from clipping behaves differently and will go from no distortion to very

noticeable distortion with a small change in power (Main System Volume). We will use

clipping distortion to determine the Maximum System Level.

With hearing protection in place and the Main System Volume set very low ( ¼ volume or

less), play track 5 of the Octet Matrix Audio Test CD. Turn up the Main System Volume until

you hear the clearly defined point of high distortion. Back off of the Main System Volume

control until the distortion levels fall back to loudspeaker distortion only. Make a note of the

Main System Volume at this point. Turn the Main System Volume down to ¼ volume.

Remove your hearing protection and play several pieces of your favorite music starting with

the Main System Volume set to ¼ volume, increasing the Main System Volume until you

reach the level determined in the previous step. If you reach a point that is too loud, or

Page 12

distorted before the level determined in the previous step, turn down the Main System

Volume to a level that is comfortable and is the loudest that you would ever use. This is the

Maximum System Level used to optimize the wireless system dynamic range.

Maximum System Level Using Source Material

This technique is the same as the confirmation phase from the prior method. Choose some

source material similar to what you normally listen to. Try to select material from different

genres as the dynamic range, and therefore the apparent loudness, varies significantly across

genres. Play the chosen source material and turn the Main System Volume up to the point

that is as loud as you would want to listen at for each selection, or to the point that distortion

becomes objectionable (Distortion may be the limiting factor in many systems). Turning the

Main System Volume above this point is counterproductive and will reduce the useful

dynamic range of the wireless system. Note the Maximum System Level chosen for each

selection.

The conservative approach is to use the minimum Main System Volume as the Maximum

System Level. This will provide lower acoustic levels from the speakers, but will ensure

system distortion is maintained at a low level at all times. A less conservative approach is to

use the average of the Main System Levels as the Maximum System Level. This will provide

higher acoustic levels from the speakers, but may occasionally produce noticeable distortion.

Page 13

Problem Possible Cause Solution

The transmit light does not go on after

DC power is applied to the transmitter.

Faulty AC adapter or faulty

power outlet.

Check the power outlet and the AC adapter. If possible, check for 9 VDC out of

the AC adapter.

Faulty AC adapter or faulty

power outlet.

Check the power outlet and the AC adapter. If possible, check for 36 VDC out

of the AC adapter.

Transmitter volume control set

too low.

Adjust the transmitter volume control. Follow System Installation procedure.

Amplifier volume control set too

low.

Adjust the amplifier volume control. Follow System Installation procedure.

Strong interference from

cordless phones or wireless

networks operating at 5.8 GHz.

Eliminate the interference, if possible. Relocate the phone base unit or

wireless router to another room. Use the 5.1 GHz wireless band instead of the

5.8 GHz band for phone or router, if possible. Relocate and/or reorient the

transmitter. Relocate and/or reorient the wireless speakers.

Transmitter volume control set

too high.

Adjust the transmitter volume control until clipping stops. Follow System

Installation procedure.

Amplifier volume control set too

high.

Adjust the amplifier volume control until clipping stops. Follow System

Installation procedure.

Strong interference from

cordless phones or wireless

networks operating at 5.8 GHz.

Eliminate the interference, if possible. Relocate the phone base unit or

wireless router to another room. Use the 5.1 GHz wireless band instead of the

5.8 GHz band for phone or router, if possible. Relocate and/or reorient the

transmitter. Relocate and/or reorient the wireless speakers.

Transmitter volume control set

too low.

Adjust the transmitter volume control. Follow System Installation procedure.

Amplifier volume control set too

low.

Adjust the amplifier volume control. Follow System Installation procedure.

Audio signal too weak.

Increase the output level of the audio source. Connect transmitter to high

level source (amplifier output)

Strong interference from

cordless phones or wireless

networks operating at 5.8 GHz.

Eliminate the interference, if possible. Relocate the phone base unit or

wireless router to another room. Use the 5.1 GHz wireless band instead of the

5.8 GHz band for phone or router, if possible. Relocate and/or reorient the

transmitter. Relocate and/or reorient the wireless speakers.

Unstable power supply.

Ensure that power outlet delivers stable voltage. Strong surges or voltage

fluctuations may cause audio dropouts. Try using a surge protector or a power

conditioner.

Strong interference from

cordless phones or wireless

networks operating at 5.8 GHz.

Eliminate the interference, if possible. Relocate the phone base unit or

wireless router to another room. Use the 5.1 GHz wireless band instead of the

5.8 GHz band for phone or router, if possible. Relocate and/or reorient the

transmitter. Relocate and/or reorient the wireless speakers.

Transmitter volume control set

too low.

Adjust the transmitter volume control. Follow System Installation procedure.

Audio signal too weak.

Increase the output level of the audio source. Connect transmitter to high

level source (amplifier output)

Strong interference from

cordless phones or wireless

networks operating at 5.8 GHz.

Eliminate the interference, if possible. Relocate the phone base unit or

wireless router to another room. Use the 5.1 GHz wireless band instead of the

5.8 GHz band for phone or router, if possible. Relocate and/or reorient the

transmitter. Relocate and/or reorient the wireless speakers.

Too many obstacles between

transmitter and speakers.

Relocate and/or reorient the transmitter. Relocate and/or reorient the

wireless speakers.

Wireless range is extremely short.

Audio is Noisy

No audio at amplifier.

Audio is distorted.

Speaker audio level is too low.

Audio drops out intermittently or

crackles.

Troubleshooting Guide

Page 14

FCC Statement

FCC ID PMJT1500

This device complies with part 15 of the FCC Rules. Operation is subject to the following two

conditions: 1) This device may not cause harmful interference, and 2) this device must accept

any interference received, including interference that may cause undesired operation.

Caution: Any changes or modifications not expressly approved by the party responsible for

compliance could void the user’s authority to operate the equipment.

Warranty

Octet Matrix Audio products are guaranteed to be free from defects in materials and

workmanship for a period of 2 years from the original date of purchase. Octet Matrix Audio

will repair or replace defective products during this period at no cost to the original end user.

This warranty does not cover damage caused by abuse or misuse of the product. Damage

caused by improper installation is the responsibility of the installer.

To return an Octet Matrix Audio product for repair work under warranty, please email us at

[email protected] to obtain a Return Material Authorization (RMA) number prior to

shipping products to us.

Resources

Free and low cost audio software

Audacity – easy to use and powerful open source audio recording and editing software. You

need this software if you do anything with audio on a computer. Use this to normalize any

song to set DWT4416 levels.

http://audacity.sourceforge.net/

BIP Oscilloscope – Turns your soundcard into a 2 channel oscilloscope.

http://www.electronics-lab.com/downloads/pc/002/index.html

Darkwood Designs – Audio Level Meters by Paul Mitchell – various audio level meters & tools

http://www.darkwood.demon.co.uk/PC/meter.html

ARTA - Audio Measurement and Analysis Software – free to use without saving results. Low

cost, high feature acoustic analysis software.

http://www.fesb.hr/~mateljan/arta/index.htm

Octet Matrix Audio DW4416-DW50 User manual

Other documents