Octet Matrix Audio DE5B-DW50 User manual

Octet Matrix Audio
DE5B-DW50 Wireless Speaker System
User’s Guide

Page 2
Copyright© 2011 Octet Matrix Audio
Table of Contents
Introduction........................................................................................................3
Features..............................................................................................................3
Specifications......................................................................................................4
System Installation .............................................................................................4
System Setup Flow Chart.....................................................................................5
Wireless System Testing......................................................................................5
Transmitter ....................................................................................................................... 6
Wireless Speakers/Wireless Amplifier................................................................................ 6
Testing the System............................................................................................................. 6
Component Installation ......................................................................................6
DWT4416 Transmitter Mounting........................................................................................ 7
DE5B-DW50 Speaker Placement/Mounting........................................................................ 8
Final Verification & Optimization........................................................................8
Channel & Phase Verification............................................................................................. 8
Dynamic Range Optimization ............................................................................................. 9
Troubleshooting Guide......................................................................................10
Highest Output Source ......................................................................................11
Maximum System Level ....................................................................................11
Maximum System Level Using 0 dBFS, 1 kHz Signal........................................................... 12
Maximum System Level Using Source Material ................................................................ 12
FCC Statement ..................................................................................................13
Warranty ..........................................................................................................13
Resources..........................................................................................................14

Page 3
Copyright© 2011 Octet Matrix Audio
Introduction
Thank you for purchasing the Octet Matrix Audio DE5B-DW50 wireless speaker system.
Please read through the entire manual before attempting to install your wireless speaker
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 speakers 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 DE5B-DW50 wireless speaker
system offers trouble free operation in most home environments.
The Octet Matrix Audio DE5B-DW50 wireless speaker 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 bookshelf monitors 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 DE5B-
DW50 speakers 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
Copyright© 2011 Octet Matrix Audio
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
Amplifier
Frequency Response 7 Hz - 22 kHz
Amplifier Power Output - 8 ohm load 50 watts RMS
THD @ 1 kHz, 50 watts 0.040%
Power Efficiency 90% typical
Channel separation 94 dB typical
DE5B-DW50 System
Frequency Response 85 Hz - 22 kHz
Speaker Weight 5 lbs. 10 oz. (2.552 kg)
Speaker Dimensions
7" wide x 12" tall x 6-3/4" deep
(178mm x 305mm x 172mm)
Transmitter Weight 10 oz. (.284 kg)
Transmitter Dimensions
7-1/2" wide x 1-3/4" tall x 6-3/4" deep
(191 mm x 45mm x 172mm)
Shipping Weight 15 lbs. (6.804 kg)
Shipping Dimensions
15-1/4" wide x 14-1/2" tall x 10-1/4" deep
(388mm x 369mm x 261mm)

Page 5
Copyright© 2011 Octet Matrix Audio
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.
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.
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 inputs
OR
Go to
Wireless
System
Testing
Section
DWT4416 RCA
Input
1
2
1a
1b
2a
2b
Do not connect
both inputs
OR
2c

Page 6
Copyright© 2011 Octet Matrix Audio
Transmitter
The DWT4416 transmitter can be placed anywhere convenient. However, do not place it 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 DE5B-DW50 Speakers in or near the desired final positions. The
locations must be close to power outlets. Rotate the DWA50L & DWA50R 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,
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 wall anchors and screw into those holes.

Page 7
Copyright© 2011 Octet Matrix Audio
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
Copyright© 2011 Octet Matrix Audio
DE5B-DW50 Speaker Placement/Mounting
The “L” or “R” appended to the end of the model number indicates which channel that
speaker will receive wirelessly from the transmitter. The DE5B-DW50 wireless speakers can
be placed on speaker stands, bookshelves, or on any flat, stable surface. They can also be
mounted to walls using the keyhole brackets attached to the rear of each speaker or with
wall mount brackets (sold separately). If you choose to mount the speakers to a wall, make
sure you screw into a stud, or use a wall anchor capable of holding 5 lbs. Each DE5B-DW50
wireless speaker 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 DE5B-DW50 wireless 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 DE5B-DW50 speakers 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
equivalently between 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 DE5B-DW50L and that “Right channel” is coming
from the DE5B-DW50R.
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
Copyright© 2011 Octet Matrix Audio
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. 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) Using one of the techniques found in the Maximum System Level section, determine
the loudest usable system level. 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.
2) Set the DWT4416 volume control to the 9:00 position.
3) Confirm that both DE5B-DW50 volume controls are at the 12:00 position.
4) Disconnect all other speakers and set the Main System Volume control to the
Maximum System Level determined in step 1.
5) 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).
6) 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.

Page 10
Copyright© 2011 Octet Matrix Audio
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 11
Copyright© 2011 Octet Matrix Audio
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).
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
The first step in optimizing the wireless system dynamic range is the most difficult;
determining the correct Maximum System Level. 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 a suitable source signal and listening. Two
approaches are provided for determination of the Maximum System Level:

Page 12
Copyright© 2011 Octet Matrix Audio
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 ear protection (over the ear or earplugs) and slowly turn up 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. 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. 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 volume until you hear the
clearly defined point of high distortion. Back off of the Main System Volume control until the
high 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
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 ever listen for each selection, or to the point that distortion
becomes objectionable (Distortion may be the limiting factor in many systems). Turning the

Page 13
Copyright© 2011 Octet Matrix Audio
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 DE5B-DW50
speakers, but will ensure lower system distortion.
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 DE5B-DW50
speakers, but may occasionally produce noticeable distortion.
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.

Page 14
Copyright© 2011 Octet Matrix Audio
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