DSP Sub Enclosure - Setup Manual

DSP Sub Enclosure - Setup Manual
DSP Sub Enclosure Product family
Triad Speakers Warranty Information
For your convenience, we have included space below for you to record your amplier model and
serial number, purchase date, dealer’s name, and phone number. You will need the following information in the event your amplier needs servicing. Please keep this manual and the sales receipt
in a safe place.
Model: __________________________ Serial #: ________________________
Dealer Name: ____________________________________________________
Purchase Date: ___________________ Phone #: _______________________
Triad North American Warranty
Triad ampliers are warranted to be free from defects in materials and workmanship for a period of
three (3) years, when operated under normal conditions.
This limited warranty period begins on the date of purchase
This limited warranty is extended only to Triad products and is expressly in lieu of all other warranties expressed or implied.
Should any defect in materials or workmanship occur within the limited warranty period, customers
in the United States should contact Triad Customer Service at 1-877-264-6315, to obtain a Return
Authorization (RA) Number. Customers in Europe should contact their dealer for service.
The product should be returned in its original packaging together with proof and date of purchase
with the RA number clearly visible on outside of the box. At our discretion, we will repair or replace
the product and return it, free from charge. If you do not have the original packaging for the product,
contact your dealer or Triad Service, and we will provide it for you.
InRoom Product
Triad Speakers, Inc.
15835 NE Cameron Blvd. • Portland, Oregon 97230
503.256.2600 Sales • 877.264.6315 Toll Free Service
InWall / InCeiling Product
Made in the USA and Canada
Triad Speakers, Incorporated - Portland, Oregon
DSP Sub Enclosure - Setup Manual
DSP Sub Enc VER .02 2013.04.01
Message from the President
Thank You...
For purchasing one of Triad’s high performance Subwoofers.
Every Triad product is designed and manufactured for both optimum performance and minimum impact on you’re decor.
All Triad DSP Subs and Amps are engineered and handcrafted with pride in North America.
Please take the time to review this information. We have developed this manual so you would be familiar with all the
performance features, and could better appreciate the superb engineering that has been built into your Triad loudspeakers.
Grill & Finish
Thanks again and happy listening.
Larry Pexton
President of Triad Speakers, Inc.
About your Triad Subwoofer
Powerful SubAmp DSP Technology, identical to our separate RackAmp DSP sub ampliers, is built into our powered DSP
Subwoofers. It combines superior Class A/B performance (350 & 600 Watts) with near Class D efciency for great sound,
low energy consumption, and low heat.
Triad Subs & SubAmps – Triad SubAmps are designed especially for our subwoofer enclosures, our DSP SubAmps drive the
maximum performance from each of our subwoofer models.
State-of-the-art DSP (digital signal processing) gives Triad subs set-up and calibration features that overcome many of the
traditional limitations of subwoofer performance and placement.
They make our subs particularly well suited to the guidelines set forth in CEA/CEDIA’s CEB22 Bulletin: “Home Theater Recommended Practice: Audio Design,” which recommends subwoofer placement options and congurations
including Multi-sub systems.
Identical performance is available from our InRoom, InWall, & InCeiling enclosures. They all produce high impact, explosive
bass for lms along with nuanced, articulated bass tones for music. You can choose your subwoofer type based on your décor,
your desired look, and where you can place it.
The high efciency of our SubAmps means low heat. You can place the powered DSP subs in a cabinet or against the wall
without additional space for ventilation.
pg. 2 - Triad DSP Sub Enclosure Manual
Triad DSP Sub Enclosure Manual - pg. 15
Application and Wiring
Multiple Subwoofer setup
Grill & Finish
Keep power cable separate
from audio signal cable
Grill and Finish
Installing & Removing InRoom Grill
Installing & Removing InWall Grill
Paint & Veneer Finish Care
Custom Paint
Low Frequency Acoustics 101
Wiring Basics
Do not bundle power cable
and audio signal cable.
Wiring Basics:
Polarity: Always maintain wiring polarity and correct absolute phase. Connect positive (+) Red wire to matching terminals,
and Negative (-) Black wire to matching terminals. Do not ip wiring from + to negative terminals. Otherwise problems can
occur due to cancellations., i.e. at crossover frequencies with main speakers and when using multiple subs. If phase reversal is needed, set the phase in the ‘Installer Menu’.
Shielding: Line level wire is prone to having it’s signal affected by higher voltages, power cables, magnetic elds, microwaves, CRT monitors, etc. It is important for audio supply line level cables to be properly shielded to reduce unwanted
noise in the system.
Power over Distance:
All speaker cable has resistance (impedance) which impedes power delivery. Speaker wire power loss increases and amplier damping factor decreases with cable length and smaller cable diameter. Usually, bigger cable is better.
Suggested Minimum Speaker Cable Awg: Power vs. cable length
Total RMS Power (watts)
14ga 14ga 14ga 14ga
14ga 14ga 14ga 12ga
12ga 12ga 12ga 10ga
3.5 Mono
Line Level
Different Types of Connectors:
XLR: Typically used with hi end audio equipment. This cable is typically highly shielded and for use with line level audio
signal. It has lower noise over long runs than unbalanced cables.
RCA: Most common type of interconnect, can be either highly shielded or non shielded (not recommended). For use with
unbalanced line level audio signal.
3.5 Mono: Typical headphone shaped jack but single channel mono. Stereo has a three conductor pin, mono has a two
conductor pin.
pg. 14 - Triad DSP Sub Enclosure Manual
Triad DSP Sub Enclosure Manual - pg. 3
Table of Contents
Grille & Finish
Box Contents
Appendix: Wiring
1/4 width
Since March, 2013 we have been shipping a new and improved SlimSub. With bass
extension and maximum output virtually identical to our InWall Bronze subs, our new
InWall Bronze/4 SlimSub requires a different RackAmp setting from our original InWall
SlimSub/4 to provide its best performance.
Grill & Finish
Old InWall SlimSub/4
User Menu Pick Sub Setting and/or
Installer Menu Current Model EQ Setting:
1/4 depth
Figure 2-A: Best Scenario
Requires four subwoofers to be located
away from the walls. Produces the lowest
seat-to-seat variance in the seating area,
but with less output than corner loaded
subs. Ceiling subs can make this approach practical.
Figure 2-B: Next Best Scenario
Produces very low seat-to-seat variance,
but does not produce as much output as
configurations 2-C or2- D.
Figure 2-D: Better Scenario
Produces acceptable seat-to-seat variance and tends
to produce slightly higher low frequency output levels
than others configurations (1–3 dB typical). Particularly helped by equalization. Requires equalization.
Can be used with just 2 subs located at front corners.
Figure 2-E: Good Scenario
Placed along long sides of the room, using 2
subwoofers to reduce 1st order room modes.
Appendix: Subwoofer Acoustics and Placement 101
Grill & Finish
Figure 2-C: Better Scenario
Produces low seat-to-seat variance, while
producing more output than 2-B
Figure 2-F: Good Scenario
Placed along short sides of the room and using 2
subwoofers to reduce 1st order room modes.
Equalization and Calibration:
Effective subwoofer optimization generally requires the use of bass management feeding the same (mono) signal to
all subs; separate channels of equalization, level or gain, and delay for each subwoofer are benecial. Not using bass
management can result in seat-to-seat variation of 40 dB or more at some frequencies or similar variations at one seat from
different subwoofers.
Because of standing waves no two seats are likely to experience the same bass response. Equalization, however, will
improve the sound quality, but the seat-to-seat differences remain unless multiple subwoofers are employed in a manner
that simplies the standing-wave patterns in a room. By using delays with multiple subwoofers to synchronize the sound
waves arrival at the main listener, ‘attack’ of low frequencies can also be optimized.
Currently published research seems to indicate that spatial effects below 80 Hz from 2-channel real world audio content
in real rooms are subtle at best, and non-existent for the bulk of popular music which employs predominantly mono bass.
Therefore carefully consider the types of program material to be listened to before choosing stereo subs. If chosen, they
can work effectively when equalized for a single listening position.
New InWall Bronze/4 SlimSub
Position seating layout to avoid room modes.
Use multiple subs at different locations to help naturally balance variances between multiple seats and to eliminate 1st order
room modes. In rectangular rooms, the arrangements of Figure 2-A are preferred, followed by 2-B, 2-C, etc.
Select optimal combination of subwoofer layout and room dimensions. If room dimensions are xed, select optimal
subwoofer layout for that set of dimensions.
Damping of low-frequency room resonances is always desirable. This may be achieved by using certain forms of wall
construction and applied dampening, but only if it does not interfere with requirements for sound isolation.
Use subwoofers that have features which allow for further optimization during calibration. Designs which allow control of
individual subwoofer level or gain and delay are particularly helpful in optimizing non-rectangular or otherwise non-trivial
room designs.
Include a high-resolution parametric equalizer in the design, with 1 channel dedicated to each subwoofer. The equalizer
should be able to place the lter’s center frequency with a resolution of 2 Hz or better, and have at least 6 independently
adjustable lters. Ideally, nal equalization should be made at the prime listening location with all subwoofers operating
pg. 4 - Triad DSP Sub Enclosure Manual
Triad DSP Sub Enclosure Manual - pg. 13
1/4 width
Grill & Finish
In March 2009 CEDIA and CEA released Bulletin CEB-22 “Home Theater Recommended Practice: Audio Design” to capsule
the latest thinking and research of some of our industry’s best minds. For best bass they recommend selective subwoofer
placement, proper seating layout, and using multiple subwoofers with delays to signicantly reduce and improve seat-toseat variation in bass frequency response. Subsequent equalization optimizes ideally positioned subwoofers and can make
less than ideally positioned subs acceptable.
General Objectives:
• There should be at least one prime listening location.
In a rectangular room with reasonably uniform wall construction, the prime listening location should be at the geometric
center of the loudspeaker array.
• Other seats should recreate the prime listening location experience as closely as possible.
• The spectral content and overall level of bass should be consistent across all seats, with no audible resonances.
1/4 width
1/4 width
1/4 depth
2nd Order
Axial Mode
1st Order
Axial Mode
1/4 depth
2nd Order
Axial Mode
Figure 1 – This floor plan shows locations of the pairs of nulls for
the 2nd order axial (width and length) room modes. The designer
should locate chairs so that the listener’s ears are more than
18” away from the 2nd order room modes indicated by the solid
gray lines. The 1st Order Room Modes are the worst and are as
indicated by the dashed lighter gray lines. These are minimized
by the use of multiple subwoofers; otherwise seating at these
locations would be problematic.
Seating Layout Guidelines:
• Avoid seats near walls, especially the back wall. Try to keep at least 3’ away.
• Offset centerline seating. Avoid seating in the center of the room on the central front-to-back or side-to-side axes unless
you have multiple subs. The use of multiple subwoofers minimizes the odd-order room modes that otherwise would be
problematic at these locations.
• Avoid null points. Avoid putting listeners’ heads at or near the null points of the low-order (1st, 2nd and 3rd order) axial
length and width standing waves. Listeners at these locations may not hear certain bass frequencies. If only 1 subwoofer is
used, the 1st order modes will be particularly bothersome because they tend to cut through the prime listening area.
This can be reduced by offsetting the screen, speaker array, and listeners at least 12 inches to the left or right of center.
Arrange other seats to place heads at least 18 inches (50cm) from null lines.
• Maintain seat distance from all speakers. Avoid putting seats too close to any one speaker, as this results in an
unbalanced sound stage, loss of envelopment, and distracting localization to the nearby loudspeaker. Delays can
accommodate some variations in speaker distances.
Home Theater – traditional conguration:
Identical subs each reproduce the entire bass spectrum.
• Each sub gets its own sub amp.
• Adjust Input Gains to match levels.
• Delay closer subs to time align them with farthest sub for
increased attack and impact.
Application and Wiring
Multiple Subwoofer setup
Home Theater – staggered conguration:
Different subs each reproduce different segments of the total bass
• Each sub gets its own sub amp.
• Adjust Input Gains to match levels.
• Delay closer subs to time align them with farthest sub for increased attack and impact.
• Each sub gets different Subwoofer High Pass & Subwoofer Low
Pass lters eg: 18” Platinum for 15-30Hz, 15” Gold for 30-50 Hz,
12” Silver for 50-80 Hz for greater headroom.
• Slopes can be individually adjusted for best integration.
2.1 Channel Stereo – House Music.
• Single mono subwoofer with stereo main speakers.
• Use RCA (Y) connector to send Pre outs to RackAmp Line
Inputs and Main speaker amplier channel inputs.
• Adjust Input Gains in RackAmp Installer Menu Setup to match
subwoofer level to Mains.
• RackAmp has 1.5ms latency to theSpeaker Output for the
subwoofer. Latency is an inherent delay from input to output,
characteristic of all DSP-based products.
• Subs can be further Delayed to time align them with the Main
speakers for better integration and imaging.
•/LQH2XWVto the main speaker channels can also be delayed &
filtered withHigh PassFURVVRYHUlters for bass management.
2.2 Channel Stereo – Dedicated System.
• Each channel gets its own sub and sub amp.
• Use two RCA (Y) connectors to send Pre Outs to separate
RackAmp Line Inputs and Main speaker amplier channel
• Adjust Input Gains to match levels of subs to Mains.
• RackAmp has 1.5ms latency to theSpeaker Output for the
subwoofer. Latency is an inherent delay from input to output,
characteristic of all DSP-based products.
• Subs can be further Delayed to time align them with the Main
speakers for better integration and imaging.
• Line Outs to the main speaker channels can also be delayed &
filtered with High Pass crossover lters for bass management.
Subwoofer Placement and Installation Guidelines:
Optimized subwoofer location is critical for clearest and most accurate bass performance. Subwoofers do not need to be
located with a line of sight to the seating area. General layout requires a non square room in order to be able to correctly
optimize the subwoofer output. Systematic research suggests that in such cases (rectangular room, seats generally at or
slightly behind the center of the room), symmetric subwoofer layouts with two or four subwoofers are preferable.
Keep in mind that these congurations are not guaranteed to work in every case, but they produce more seat-to-seat
consistency on average.
pg. 12 - Triad DSP Sub Enclosure Manual
Application and Wiring
Grill & Finish
Optimization Overview:
At all frequencies, the listening environment has a signicant impact on the sound quality of an audio system. At low
frequencies it can be THE determining factor for perceived sound quality. Standing waves (AKA room modes) are peaks and
valleys of bass frequencies caused by the physical size of each bass wavelength interacting with the room’s dimensions.
Standing waves cause large frequency response variations at different frequencies at the listening location. To make matters worse, they produce different variations at different locations (in 3 dimensions!). For proof simply listen to the variations
in volume of a constant bass tone while you walk around a room. Notice how it gets very loud near the back wall where
standing waves cluster. These response differences can be greatly affected by speaker as well as listener positioning.
Appendix: Subwoofer Acoustics and Placement 101
Triad DSP Sub Enclosure Manual - pg. 5
Grill & Finish
Grill & Finish
Room Layout
pg. 6 - Triad DSP Sub Enclosure Manual
Triad DSP Sub Enclosure Manual - pg. 11
The paint and veneer nish on all Triad speakers
are designed to last a lifetime with minimal care. No
polishing is necessary to maintain surface shine and
Grill & Finish
If cleaning the surface becomes necessary gently
wipe the speaker box with a soft cloth lightly dampened with a mild soap and water solution.
- Use a maximum of two 8 ohm subs, only available in Mini
and Bronze subwoofer enclosures including all Bronze SlimSubs. Use only RackAmp DSP 300 or V2 350 Ampliers.
Finish Maintenance & Care
Grill & Finish
Only applies to V2 RackAmp 350 DSP and 8 ohm Mini and Bronze subwoofer enclosures including all Bronze Slim-Subs.
2 Subs/1 Amp
2 Subs and 1 Amp
Finish Care
• If using with processor or receiver that does not auto set the
sub delay, you can compensate for the .5mS latency of the
DSP when adjusting sub delay.
Custom Paint - InWall Grills & Frames
Custom paint is available at the time your speaker or
subwoofer is ordered.
If you supply an actual sample or a paint number from a
major paint supplier, we can paint your grille (and your new
speaker) any color you wish. However, once the speaker
is in your possession, we suggest the grill not be
Because we use expanded metal and automotive spray
tech-niques, your results may be poor. If you wish to change
grill color, we suggest you order a new grill from your
authorized Triad dealer, supplying your paint sample at that
time. The results will be superior, and you will also be
supplied with a small bottle of touch-up paint.
pg. 10 - Triad DSP Sub Enclosure Manual
- Use a maximum of two 8 ohm subs, only available in
Mini and Bronze subwoofer enclosures including all Bronze SlimSubs. Use only RackAmp DSP 300 or V2 350 Ampliers.
• If using with processor or receiver that does not auto set the
sub delay, you may compensate for the 1.5mS latency of the DSP
when adjusting sub delay.
Triad DSP Sub Enclosure Manual - pg. 7
InRoom Grill Installation
Step 1. Hook left edge of the grill around the front bafe.
InWall Grill Installation & Removal
InWall Grill Installation
Step 2. Press the upper right grill edge until it seats.
Step 3. Press and seat the right edge in the middle and
Grill & Finish
Step 1. Gently press the corner of the grill into the
frame recess.
bottom until fully seated.
Step 2. Continue pressing the grill into the frame in
a clockwise direction until fully seated.
Grille & Finish
InRoom Grill Installation & Removal
InRoom Grill Removal
Step 1. Gently press the grill face to create some ease at
the side edge.
Step 2. Pull the side edge of the grille from the front baf e
and separate the grill edge all the wy down the speaker.
Remove grill.
InWall Grill Removal
Step 1. Gently press the grill pick in the grill face at the
top right corner.
Step 2. Pull the corner of the grill away from the frame
and separate the grill from the speaker.
Remove grill.
pg. 8 - Triad DSP Sub Enclosure Manual
Triad DSP Sub Enclosure Manual - pg. 9
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