MartinLogan Depth subwoofer User Manual
D EPTH
TM
user’s manual
c l s e l e c t r o s t a t i c
M ARTIN L OGAN
2 Contents
CONTENTS
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation in Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Introduction and Assembly . . . . . . . . . . . . . . . . . . . . . .4
Introduction
Trim Removal and Installation
About the Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Connections and Control Settings . . . . . . . . . . . . . . . . .6
Before Connecting the Depth
2-Channel Mode
Multi-Channel Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2-Channel/Multi-Channel Mode . . . . . . . . . . . . . . . . . .8
2-Channel Using Speaker Level Inputs . . . . . . . . . . . . .9
2-Channel Mode With 2-Channel Output . . . . . . . . .10
Why the Filters Are Not Equal
Sub Out—Using Multiple Depths . . . . . . . . . . . . . . . .11
AC Power Connection . . . . . . . . . . . . . . . . . . . . . . . . .12
Replacing the Fuse
Break-In
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Listening Position
Installing the Depth in a Cabinet
Ask Your Dealer
Enjoy Yourself
Room Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Your Room
Terminology
Solid Footing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Home Theater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Depth Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
BalancedForce™ For Cleaner Bass
Servo-Controlled Dynamic Drivers
Low-Pass Filters Maximize Blending
25Hz Level Control
TriLinear™ Configuration
Frequently Asked Questions & Troubleshooting . . . .18
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Specifications
Warranty and Registration
Service
Glossary of Audio Terms . . . . . . . . . . . . . . . . . . . . . . . .20
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3Installation in Brief 3
INSTALLATION IN BRIEF
We know that you are eager to hear your new Depth subwoofer, so this section is provided to allow fast and easy
set up. Once you have it operational, please take the time
to
read, in depth, the rest of the information in this manual.
It will give you perspective on how to attain the greatest
possible performance from this most exacting woofer system.
If you experience any difficulties in setup or operation of the
Depth, please refer to the Placement, Room Acoustics and
Connections and Control Settings sections of this manual.
Should you encounter a persistent problem that cannot be
resolved, please contact your authorized MartinLogan dealer.
They will provide you with the appropriate technical analysis
to alleviate the situation.
WARNING!
•Hazardous voltages exist inside—do not
remove cover.
•Refer servicing to a qualified technician.
•To prevent fire or shock hazard, do not
expose this module to moisture.
•Unplug subwoofer should any abnormal
conditions occur.
•Use only with a grounded outlet.
Step 1: Unpacking
Remove your new Depth subwoofer from its packing.
Step 2: Placement
Ideally, place the Depth in a corner near the front of the
room. This is a good place to start. Please see the Placement
section (page 13) of this manual for more details.
Step 3: Signal Connection
Use the best interconnect cables you can. High quality cables,
available from your specialty dealer, are recommended and
will give you superior performance.
Attach your preamplifier/processor outputs through cables
to the signal input area located on the Depths rear panel.
Please see the Connections and Control Settings section
(pages 6–12) of this manual for more details.
If you plan to connect your Depth using signal level (high
level) inputs, please refer to page 9 for instructions.
Step 4: Power Connection (AC) (see warning)
Make sure the level knob is set at 0. Plug the Depth subwoofer
into a wall outlet. Please see the Connections and Control
Settings section (page 12) of this manual for more details.
Step 5: Setting the Controls
Set the level knob to a medium volume position (12 o'clock).
Set the 25Hz Level to 0 (12 o'clock). Set the power switch
on the front of the Depth to ‘Auto’.
Step 6: Listen and Enjoy
Now, you may adjust your system and enjoy!
The lightning bolt flash with arrowhead symbol, within
an equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product’s enclosure that may be of sufficient magnitude
to constitute a risk of electric shock.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.
4 Introduction and Assembly
INTRODUCTION AND ASSEMBLY
Congratulations! You have invested in one of the world's
premier subwoofers.
The MartinLogan Depth represents the culmination of an
intensive, dedicated team research program directed toward
establishing a world class reference subwoofer using leadingedge technology, without compromising durability, reliability,
craftsmanship or aesthetics.
The Depth subwoofer uses three custom 8-inch high-excursion drivers in a BalancedForce™ bass alignment, which
dramatically reduces cabinet vibrations. This allows deep,
tight, well-defined bass. Servo-controlled woofers minimize
distortion. A proprietary amplifier is used to drive the output
stage with precision and extremely high efficiency. Lowpass filtering, high-pass filtering and phase control have
been designed to make integrating the Depth subwoofer
with MartinLogan and non-MartinLogan products both
seamless and simple.
The materials in your new Depth subwoofer are of the
highest quality and will provide years of enduring enjoyment
and deepening respect. The cabinetry is constructed from
the finest composite material for acoustical integrity and is
finished with our attractive custom matte coat.
This User's Manual will explain in detail the operation of
your Depth subwoofer and the philosophy applied to its
design. A clear understanding will insure that you obtain
maximum performance and pleasure from this most exacting subwoofer.
1 Simultaneously push the two points of the trim closest to
the front grill of the Depth.
2 Remove the trim from the Depth cabinet.
3 Insert new trim and press into place.
Introduction Trim Removal and Installation
Level Knob
Setting the level too high will cause the bass to seem bloated
and is the single most common cause of bad sounding
subwoofers. A rule of thumb is that the subwoofer should
not draw attention to itself, but should simply make the
systems low end seem more extended and accurate.
Low Pass Filter Knob
When the Depth is connected in multi-channel mode (via
its LFE input), the low pass filter is not active and your
processor handles the bass management. When connected
in 2-channel mode (via its speaker or line level left/right
input) the low-pass filter is active.
As a general rule the low pass filter should be set at the
option approximately equal to 70% of you speakers lowest
frequency response. Example: The MartinLogan Aeon’s
lowest frequency response is 43Hz. 70% of 43Hz equals
30.1, so you should set the Depth’s low pass filter to 30Hz.
Remember, this is a general rule. We advise that once you
try the recommended setting using the formula above, you
should try the surrounding settings to see which sounds best.
Phase Control Knob
The phase control is entirely dependent on the size and
configuration of your listening environment, the placement
of the unit, and your seating arrangement. Due to the way
bass sound waves develop in different rooms, there is no rule
of thumb for setting phase. For Instance, if your room has a
peak at the subwoofer crossover area, you may wish to set
the phase so the actual acoustic outputs of the subwoofer and
main speakers are out of phase. Experiment, try different
settings and be patient.
25Hz Level Knob
The 25Hz Level knob significantly adjusts the level between
20 and 30Hz by ±12dB. This is an area where peaks and dips
of different amplitudes often manifest in real environments.
This setting is dependent on room size and construction,
system configuration and personal preference.
Auto/On/Standby Power Switch
The Auto/On/Standby switch controls Depth’s energy saving
feature. When set to 'Auto', the Depth will turn on when a
music signal is detected and off when there is none. The 'On'
setting prevents the Depth from entering energy saving
mode. The 'Standby' setting forces the Depth into energy saving mode. While set to 'Standby’, the Depth will not perform.
Status Light
The Depth is equipped with a multi-color LED to indicate
the subwoofers current status. The following list explains
the meaning of the different colors:
No color: No power. The Depth is not plugged in.
Yellow: Energy saving mode. If the power switch is set to
‘Auto’ this indicates the Depth detects no audio signal and
has automatically switched into energy saving mode.
Setting the power switch to ‘Standby’ will force the Depth
into this mode.
Green: Play mode. If the power switch is set to ‘Auto’ this
indicates the Depth detects an audio signal and has automatically switched into play mode. Setting the power switch
to ‘On’ will force the Depth into this mode.
Red: Safety mode. This indicates that the Depth’s temperature has exceeded nominal operating range. The Depth will
resume normal play mode when the temperature-sensor
reports a safe operating temperature.
ABOUT THE CONTROLS
About the Controls 5
Figure 1. Depth controls located on the back of the subwoofer.
CONNECTIONS AND CONTROL SETTINGS
MartinLogan engineers designed the Depth for easy setup
and system integration. Before beginning to connect your
Depth, please review the controls discussed in the last section. An understanding of these will help speed you along as
you connect your Depth with your system. All signal connections are done at the signal input section on the rear
connections panel of the Depth. Make certain that all of
your connections are tight.
WARNING! Turn your Depth subwoofer off
before making or breaking any signal connections!
2-Channel Mode
This setup is recommended if your Depth will be used in a
2-channel system with main speakers playing full range.
When a signal is connected to the Depth’s Left/Right Inputs,
the Depth’s internal low pass filter is active.
Signal Connection (see figure 2):
1 Connect the left and right outputs of your preamplifier to
the left and right inputs of the Depth using quality RCA
interconnects. If your preamplifier only has one set of outputs you may need to obtain Y adapters from your dealer.
Recommended Control Settings (see figure 3):
1 Set the 25Hz Level control to 0.
2
Set the low-pass filter switch to to the closest option equal
to 70% of your loudspeakers lowest frequency response.
3 While playing music with bass content, turn the level con-
trol up until the music has deep extended bass, being
careful to avoid levels that become overwhelming.
4 Try the phase control in different settings until the best
blending is obtained. If you are using the Depth to augment other MartinLogan products, we suggest you start
with the phase set at 90° (0° if you are using Script™
loudspeakers).
5 If you have completed steps 1–4 and still have weak or
boomy bass, adjust the 25Hz knob to compensate for
these anomalies. Turn the 25Hz control up and down and
listen to the effects that it has on the music. Try to find a
position that sounds correct to you. Experiment by changing the level control while adjusting this knob. You should
be able to find a position that gives you deep extended
bass and good blending with your main speakers.
Before Connecting the Depth
6 Connections and Control Settings
Figure 2. Signal connection for 2-channel mode.
Figure 3. Control settings for 2-channel mode.
Connections and Control Settings 7
Multi-Channel Mode
This setup is recommended if your Depth will be used in a
dedicated home theater or multi-channel system. When a
signal is connected to the Depth’s LFE input, Depth’s internal
low pass filter is not active. By following this setup, you will
allow your processor to handle most of the bass management.
Signal Connection (see figure 4):
1 Connect the LFE/0.1 subwoofer output of the processor
to the LFE input of the Depth using a quality interconnect.
WARNING!
Based on the performance of most processors,
it is recommended that MartinLogan center and
effects type speakers (i.e. Cinema, Theater and
Script) not be run in large, wide or full range mode.
Doing so may potentially damage the speaker if
the processor attempts to drive the speaker beyond
its rated frequency range. This warning also
applies to products from other manufacturers.
It is recommended to run center and effects type
speakers in limited or narrow mode.
Some processor’s have an option to route the 0.1
channel to your main and/or surround speakers.
We recommend that you do not use this option.
Recommended Control Settings (see figure 5):
1 Set the 25Hz Level control to 0.
2 Use the bass management section of your processor‘s
speaker level setup option to set the subwoofer level at an
appropriate level. Follow the instructions in your processor manual to fine-tune the subwoofer level.
3 If your processor offers the option to setup crossovers for
a subwoofer, we recommend that you start with the following settings—Crossover: 70Hz, High-Pass: 12dB, and
Low-Pass: 24dB. The optimal setting for these options may
vary depending on your room and listening preferences.
4 Adjust the phase control until ideal blending is obtained.
If you hear no discernable difference leave the phase at 0°.
5 If you have completed steps 1–3 and still have weak or
boomy bass, adjust the 25Hz knob to compensate for
these anomalies. Turn the 25Hz control up and down and
listen to the effects that it has on the sound. Try to find a
position that sounds correct to you. Experiment by changing the level control while adjusting this knob. You should
be able to find a position that gives you deep extended
bass and good blending with your main speakers.
6 Follow the instructions in your processor manual to fine-
tune the subwoofer level.
Figure 4. Signal connection for multi-channel mode.
Figure 5. Control settings for multi-channel mode.
8 Connections and Control Settings
Using an A/V processor and the Depth’s low pass filters.
This setup is recommended if your Depth will be used in
both 2-channel mode and as a LFE (0.1) channel in a multichannel mode. By following this setup, you will allow your
processor to handle most of the bass management while running in multichannel mode, and relinquish control of the low
pass filter to the Depth when running in a 2-channel mode.
Signal Connection (see figure 6):
1 Connect the left and right outputs of your preamplifier to
the left and right inputs of the Depth using quality RCA
interconnects. If your preamplifier only has one set of
outputs you need to obtain Y adapters from your dealer.
2 Connect the LFE/0.1 output of the processor to the LFE
input of the subwoofer using quality RCA interconnects.
Recommended Control Settings (see figure 7):
1 Set the 25Hz Level control to 0.
2 Set your front speakers for wide, large or full mode in
your processor. Set the center and effects type speakers
in limited or narrow mode (see the warning on page 7).
3
Set the low-pass filter switch to to the closest option equal
to 70% of your loudspeakers lowest frequency response.
4 While playing music with bass content, turn the level
control up until the music has deep extended bass that
is not overwhelming.
5 Try the phase control in different settings until the best
blending is obtained. If you are augmenting MartinLogan
loudspeakers, we suggest you start with the phase set at
90° (0° if you are using Script loudspeakers).
6 If you have completed steps 1– 5 and still have weak or
boomy bass, adjust the 25Hz knob to compensate for
these anomalies. Turn the 25Hz control up and down and
listen to the effects that it has on the music. Try to find a
position that sounds correct to you. Experiment by changing the level control while adjusting this knob. You should
be able to find a position that gives you deep extended
bass and good blending with your main speakers.
7 Use the bass management section of your processor’s
speaker level setup option to set the subwoofer level at
an appropriate level. Follow the instructions in your
processor manual to fine-tune the subwoofer level.
8 If your processor offers the option to setup crossovers for
a subwoofer, we recommend that you start with the following settings—Crossover: 70Hz, High-Pass: 12dB, and
Low-Pass: 24dB. The optimal setting for these options may
vary depend on your room and listening preferences.
2-Channel/Multi-Channel Mode
Figure 6. Signal connection for 2-channel/multi-channel mode.
Figure 7. Control Settings for 2-channel/multi-channel mode.
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