MartinLogan Dynamo 1500X Specifications

DYNAMO
TM
TM
u s e r ’ s
m a n u a l
MA R T I N LOGA N
®
the loudspeaker technology company
CONTENTS
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation in Brief . . . . . . . . . . . . . . . . . . . . . . . .3
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
About the Controls . . . . . . . . . . . . . . . . . . . . . . . .5
Connections and Control Settings . . . . . . . . . . . . .6
Before Connecting the Dynamo
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
Sub Out—Using Multiple Dynamos . . . . . . . . . . . . 11
AC Power Connection . . . . . . . . . . . . . . . . . . . . . . 12
Replacing the Fuse
Break-In
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Listening Position
Ask Your Dealer
Enjoy Yourself
Installing Dynamo in a Cabinet . . . . . . . . . . . . . . . 14
2
Contents
Room Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . .15
Your Room
Terminology
Solid Footing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Home Theater . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Frequently Asked Questions & Troubleshooting. .18
General Information . . . . . . . . . . . . . . . . . . . . . .19
Specifications
Warranty and Registration
Service
Glossary of Audio Terms . . . . . . . . . . . . . . . . . . .20
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
INSTALLATION
We know that you are eager to hear your new Dynamo 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
Dynamo, please refer to the Placement, Room Acoustics
and Connections and Control Settings sections.
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.
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.
IN
BRIEF
Step 1: Unpacking
Remove your new Dynamo subwoofer from its packing.
Please note, Dynamo's grill cover should not be used
in the standard down firing configuration. The grill
cover is supplied for use while the Dynamo is orientated in the optional front firing configuration
(see page 14).
Step 2: Placement
Ideally, place the Dynamo 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 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 Dynamo’s 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 Dynamo using speaker level
(high level) inputs, please refer to the 2-Channel Mode
Using Speaker Level Inputs section (page 9) of this manual
for more details.
Step 4: Power Connection (AC) (see warning)
Make sure the level knob is set at 0. Plug the Dynamo
subwoofer into a wall outlet. Review the AC Power Connection
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 power switch to ‘Auto’.
Step 6: Listen and Enjoy
Now, you may adjust your system and enjoy!
Installation in Brief
3
INTRODUCTION
Congratulations! You have invested in one of the
world's premier subwoofers.
The MartinLogan Dynamo represents the extension of
an intensive, dedicated team research program directed toward establishing a world class line of reference
subwoofers using leading-edge technology, without
compromising durability, reliability, craftsmanship or aesthetics.
The Dynamo subwoofer uses a 10-inch high-excursion
aluminum element driver to achieve deep, tight, welldefined bass. A proprietary amplifier is used to drive the
output stage with precision and extremely high efficiency.
Low-pass filtering and phase control have been designed to
make integrating the Dynamo subwoofer with MartinLogan
and non-MartinLogan products both seamless and simple.
4
Introduction
The materials in your new Dynamo 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 an attractive custom coating.
This User's Manual will explain in detail the operation of
your Dynamo 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.
ABOUT
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 Dynamo 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.
THE
CONTROLS
Red: Energy saving mode and safety mode. If the power
switch is set to ‘Auto’ this indicates the Dynamo detects no
audio signal and has automatically switched into energy
saving mode. Setting the power switch to ‘Standby’ will
force the Dynamo into this mode. This also indicates if the
Dynamo’s temperature has exceeded nominal operating
range. The Dynamo will resume normal play mode when the
temperature-sensor reports a safe operating temperature.
Green: Play mode. If the power switch is set to ‘Auto’
this indicates the Dynamo detects an audio signal and has
automatically switched into play mode. Setting the power
switch to ‘On’ will force the Dynamo into this mode.
As a general rule the low pass filter should be set at the
option approximately equal to 70% of your speaker’s lowest
frequency response. Example: The MartinLogan Aeon i’s
lowest frequency response is 43Hz. 70% of 43Hz equals
30.1, so you should set the Dynamo’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 Switch
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.
Auto/On/Standby Power Switch
The Auto/On/Standby switch controls Dynamo’s energy
saving feature. When set to 'Auto', the Dynamo will turn
on when a music signal is detected and off when there is
none. The 'On' setting prevents the Dynamo from entering energy saving mode. The 'Standby' setting forces the
Dynamo into energy saving mode. While set to 'Standby’,
the Dynamo will not perform.
Status Light
The Dynamo 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 Dynamo is not plugged in.
Figure 1. Dynamo controls.
About the Controls
5
CONNECTIONS
AND
CONTROL SETTINGS
Before Connecting the Dynamo
MartinLogan's engineering and design team developed the
Dynamo for easy setup and system integration. Before
beginning to connect your Dynamo, please review the
controls discussed in the last section. An understanding
of these will help speed you along as you connect and
integrate your Dynamo with your system. All signal
connections are done at the signal input section on
the rear connections panel of the Dynamo. Make certain
that all of your connections are tight.
WARNING! Turn your Dynamo subwoofer to
standby before making or breaking any signal
connections!
2-Channel Mode
This setup is recommended if your Dynamo will be used in
a 2-channel system with main speakers playing full range.
When a signal is connected to the Dynamo’s left/right
inputs, the Dynamo’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 Dynamo using quality
RCA interconnects. If your preamplifier only has one set
of outputs you may need to obtain Y adapters from your
dealer.
Figure 2. Signal connection for 2-channel mode.
Recommended Control Settings (see figure 3):
1 Set the low-pass filter switch to the closest option equal to
70% of your loudspeakers lowest frequency response.
2 While playing music with bass content, turn the level control up until the music has deep extended bass, being
careful to avoid levels that become overwhelming.
3 Try the phase control in different settings until the best
blending is obtained. If you are using the Dynamo to
augment other MartinLogan products, we suggest you
start with the phase set at 90°.
Figure 3. Control settings for 2-channel mode.
6
Connections and Control Settings
Multi-Channel Mode
This setup is recommended if your Dynamo will be used in a
dedicated home theater or multi-channel system. When a
signal is connected to the Dynamo’s LFE input, Dynamo’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 Dynamo using a quality RCA interconnect.
WARNING!
Based on the performance of most processors,
it is recommended that MartinLogan center and
effects type speakers (i.e. Cinema i, Theater i and
Script i) 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 processors 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.
Figure 4. Signal connection for multi-channel mode.
Recommended Control Settings (see figure 5):
1 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.
2 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 LowPass: 24dB. The optimal setting for these options may
vary depending on your room and listening preferences.
3 Adjust the phase control until ideal blending is obtained.
If you hear no discernible difference leave the phase at 0°.
4 Follow the instructions in your processor manual to
fine-tune the subwoofer level.
Figure 5. Control settings for multi-channel mode.
Connections and Control Settings
7
2-Channel/Multi-Channel Mode
Using an A/V processor and the Dynamo’s low pass filters.
This setup is recommended if your Dynamo will be used
in both 2-channel mode and as a LFE (0.1) channel in
a multi-channel mode. By following this setup, you will
allow your processor to handle most of the bass management while running in multi-channel mode, and relinquish
control of the low pass filter to the Dynamo 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 Dynamo 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 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).
Figure 6. Signal connection for 2-channel/multi-channel mode.
2 Set the low-pass filter switch to the closest option equal to
70% of your loudspeakers lowest frequency response.
3 While playing music with bass content, turn the level control
up until the music has deep bass that is not overwhelming.
4 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°.
5 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’s manual to fine-tune the subwoofer level.
6 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 LowPass: 24dB. The optimal setting for these options may vary
depending on your room and listening preferences.
8
Connections and Control Settings
Figure 7. Control Settings for 2-channel/multi-channel mode.
2-Channel Mode Using Speaker Level Inputs
This setup is recommended if your Dynamo will be used in
a 2-channel only system with full-range front loudspeakers.
When a signal is connected to the Dynamo’s Left/Right
Inputs, the Dynamo’s internal low pass filter is active.
Signal Connection (see figure 8):
1 Connect the left and right outputs of your amplifier to
the left and right speaker level (high level) inputs of the
Dynamo using quality speaker cable.
If your amplifier only has one set of outputs you may
connect your amplifier to your speakers as normal and
run an additional set of cables from your speakers to the
Dynamo’s left and right speaker level (high level) inputs.
It is also possible to connect the left and right outputs
of your amplifier to the left and right speaker level (high
level) inputs of the Dynamo and run an additional set
of cables from your Dynamo to the speakers.
Recommended Control Settings (see figure 9):
1 Set the low-pass filter switch to the closest option equal to
70% of your loudspeakers lowest frequency response.
Figure 8. Signal connection for 2-channel mode using speaker level inputs.
2 While playing music with bass content, turn the level control up until the music has deep extended bass, being
careful to avoid levels that become overwhelming.
3 Try the phase control in different settings until the best
blending is obtained. If you are using the Dynamo to augment other MartinLogan products, we suggest you start
with the phase set at 90°.
Figure 9. Control settings for 2-channel mode using speaker level inputs.
Connections and Control Settings
9
2-Channel Mode With 2-Channel Output
This setup is recommended if your Dynamo will be used in
a 2-channel only system.
Signal Connection (see figure 10):
1 Connect the left and right outputs of your preamplifier
to the left and right inputs of the Dynamo using quality
RCA interconnects.
2 Connect the left and right outputs of your Dynamo to
the left and right inputs of your amplifier using quality
RCA interconnects.
Recommended Control Settings (see figure 3):
1 Set the controls as recommended on page 6.
Figure 10. Signal connection for 2-channel mode with 2-channel output.
10
Connections and Control Settings
Sub Out—Using Multiple Dynamo's
Using Sub Out offers an easy way to implement multiple
Dynamo's in your audio/video system.
Note: All additional Dynamo subwoofers must run as
either dedicated 2-channel (stereo) or multi-channel (LFE)
subwoofers, but not both.
Signal Connection:
1 Connect the first Dynamo to your system using one of
the five modes previously described.
2 Connect the Sub Out of the previous Dynamo to either the
LFE or the Right (or Left) input of the next Dynamo using
a quality RCA interconnect. Connecting to the LFE input
allows additional subwoofers to perform as dedicated
LFE channels (see figure 11). Connecting to the Right
(or Left) input allows additional subwoofers to perform
as dedicated 2-channel subwoofers (see figure 12).
3 Repeat step 2 for each additional Dynamo subwoofer in
the chain using the same input for every connection.
Figure 11. Signal connection for using multiple Dynamos for LFE.
Recommended Control Settings:
1 Adjust the control settings of the first subwoofer using
the recommended control settings from the connection
method used to connect the master Dynamo with your
audio system.
2 Adjust the control settings of each additional subwoofer
using the recommended control settings from the connection method used to connect the master Dynamo
with your audio system.
Note: While the settings of each subwoofer should be
similar, you will probably find that each sub will need
to be tweaked for optimal performance because of its
unique room placement.
Regardless of how you use your subwoofer, experimentation can often result in better sound. Don't be afraid to
try different settings. You can always return the controls to
their previous locations.
Figure 12. Signal connection for using multiple Dynamos for stereo.
Connections and Control Settings
11
AC Power Connection
WARNING! The power cord should not be
installed, removed, or left detached from the
subwoofer while the other end is connected to
an AC power source.
The IEC power cord should be firmly inserted into the
AC power receptacle on the rear connection panel of
the Dynamo, then to any convenient AC wall outlet. The
Dynamo also integrates a signal sensing power supply
that automatically switches off after sensing no music signal
for several minutes (this will occur when the power switch
is set to 'Auto').
Your Dynamo subwoofer is wired for the power service supplied in the country of original consumer sale. The AC power
rating applicable to a particular unit is specified both on the
packing carton and on the serial number plate attached to
the subwoofer.
If you remove your Dynamo subwoofer from the country of
original sale, be certain that AC power supplied in any subsequent location is suitable before connecting and operating
the subwoofer. Substantially impaired performance or severe
damage may occur to the Dynamo subwoofer if operation is
attempted from an incorrect AC power source.
Figure 13. IEC power cord AC receptacle and fuse.
12
Connections and Control Settings
Replacing the Fuse
If the fuse in your Dynamo should require changing, turn off
and unplug your Dynamo before removing the fuse. Replace
the bad fuse with a matching T 2A L 250V (T 1A L 250V if
you are in a region using 230v–240v current).
Break-In
Our custom made woofers require approximately 50 hours
of break-in at moderate listening levels before their optimal
performance occurs. This will factor in on any critical listening
and judgment.
PLACEMENT
Listening Position
Generally, subwoofers have the most output when placed
in the corner of a room. However, this can also exaggerate the subwoofers output making blending difficult. We
recommend starting by placing the Dynamo in a corner.
If, after the full range of tuning techniques have been
employed, the subwoofer sounds like it has too much upper
bass energy try pulling it away from the wall, toward the listening position. This will lessen the reinforcement of these
problematic frequencies from the wall and likely smooth
out the response. Repeat the tuning techniques with the
woofer controls after you move it (see figure 14).
Ask Your Dealer
Your MartinLogan dealer can suggest many options for
optimal subwoofer placement. They also have many tools
at their disposal, such as experience, familiarity with the
associated equipment and even sound analysis equipment
which may make the task of determining optimal subwoofer
placement easier.
Enjoy Yourself
The Dynamo is a very refined subwoofer and will benefit
from care in setup. With the above placement tips in mind
you will find, over months of listening, that small changes
can result in measurable differences. As you live with your
subwoofer, do not be afraid to experiment with positioning
until you find the optimal relationship between your room,
settings and subwoofer that gives you the best results. Your
efforts will be rewarded.
Figure 14. Dynamo Subwoofers as the LFE (effects) channels,
MartinLogan Clarity™ speakers as front and surround (effects) channels,
MartinLogan Fresco™ as the center channel. Note the corner placement
of the Dynamo at the front of the listening room.
Placement
13
Installing Dynamo in a Cabinet
When placing the Dynamo inside of a cabinet it is recommended that there be a minimum of three inches of open
space between the cabinet and the front and back sides
(see figure 15).
When installing the Dynamo in a cabinet it is recommended
that the subwoofer be converted to a front firing configuration.
Please note, when the Dynamo is in a front firing configuration
90° RCA adaptors may be required to make signal connections.
Two 90° RCA adaptors are included with the Dynamo subwoofer.
Converting Dynamo to Front Firing Configuration:
1 Prepare a flat surface with a blanket to protect the Dynamo's
finish. Unplug signal and power connections. Turn the
Dynamo upside down. Gently lift and remove the Dynamo
base (see figure 16).
Figure 16. Step 1—Converting the Dynamo to a front firing configuration.
2 Rotate the cabinet 90°, positioning the backplate on top
(see figure 17).
3 Place the Dynamo base over the backplate and gently
push it into place. Install the grill cover onto the front of
the Dynamo (see figure 18). Please note, when the Dynamo
is used in a down firing configuration 90° RCA adaptors
may be required to make signal connections. Two 90°
RCA adaptors are included with the Dynamo subwoofer.
Figure 17. Step 2—Converting the Dynamo to a front firing configuration.
Figure 15. Placing the Dynamo in a cabinet requires a minimum of three
inches of open space on the front and back.
14
Placement
Figure 18. Step 3—Converting the Dynamo to a front firing configuration.
ROOM ACOUSTICS
Your Room
This is an area that requires both a little background to
understand and some time and experimentation to attain
the best performance from your system.
Your room is actually a component and an important part
of your system. This component is a large variable and can
dramatically add to or subtract from a great sonic experience.
All sound is composed of waves. Each frequency has its
own wave size, with the lower, or bass frequencies literally
encompassing from 10 feet to as much as 40 feet. Your
room participates in this wave experience like a swimming
pool with waves reflecting and becoming enhanced depending on the size and shape of the room and the types of
surfaces in the room.
Remember that your audio system can actually generate
all of the information required to recreate a sonic event in
time, space, and tonal balance. Acoustically, the role of
an ideal room would be to neither delete nor contribute
to that information. However, nearly every room does to
some degree.
Terminology
Standing Waves
Sound coming from a speaker bounces around in a room
until a pattern emerges—this is called a standing wave.
Typically, this is only a problem with frequencies below
100Hz. When this happens different parts of your room
experience either an excess or a lack of bass.
Some people believe that having a room without parallel
walls will eliminate this effect. The truth is that non-parallel
walls only generate different standing wave patterns than
those that occur in rectangular rooms.
Usually, you can excite most of the standing waves in a
room by putting the Dynamo in a corner. Listening position determines which standing waves you will experience.
For instance, if you sit in a corner you will hear most of
the standing waves. This can be an overpowering experience. Sitting next to a wall can also intensify the levels of the
standing waves that are experienced.
Resonant Surfaces and Objects
All of the surfaces and objects in your room are subject to
the frequencies generated by your system. Much like an
instrument, they will vibrate and "carry on" in syncopation
with the music, and may contribute in a negative way to
the sound. Ringing, boominess, and even brightness can
occur simply because surfaces and objects are "singing
along" with your speakers.
Resonant Cavities
Small alcoves or closet type areas in your room can be
chambers that create their own "standing waves" and can
drum their own "one note" sounds.
Room Acoustics
15
Solid Footing
After living and experimenting with your Dynamo, you
may want to use Mini ETC™(Energy Transfer Coupler)
Spikes (see figure 19), available from the Xtatic shop at
www.martinlogan.com. With the use of these spikes, the
Dynamo will become more firmly planted on the floor
and, consequently, bass will tighten. It is best not to
implement the spikes, however, until you are secure in
the positioning, as the spikes can damage the floor if the
subwoofer is moved. MartinLogan Mini ETC spikes will fit
any common 1/4-inch thread insert that may be found on
your other audio equipment (racks, speakers, etc).
Spike Installation Instructions:
1 Carefully lay the Dynamo on its side to gain access to
the bottom.
2 Remove existing feet or spikes. Thread new spikes into
holes and screw them in all of the way.
3 Tighten jam nut snugly by hand. Do not over tighten
the nut.
4 Right the subwoofer.
Caution: Make sure your hands and any cabling are
clear of the spikes. Do not slide the subwoofer as spikes
are sharp and can damage your floor or carpet.
5 Adjust to level by rotating spikes. Tighten the jam nut
securely when satisfied that the subwoofer is level.
Caution: Walking the Dynamo may result in a broken spike.
16
Room Acoustics
Figure 19. The Mini ETC Spike.
HOME THEATER
It had long been the practice of stereo buffs to connect
their television to the stereo system. The advantage was the
use of the larger speakers and more powerful amplifier of the
stereo system. Even though the sound was greatly improved,
it was still mono and limited by the broadcast signal.
In the late 1970's and early ‘80's two new home movie formats
became widely available to the public: VCR and laser disc.
At the same time video screen sizes began increasing.
By 1985, both formats had developed into very high quality audio/video sources. In fact, the sonic performance of
some video formats exceeded audio-only formats. Now,
with theater quality sound available at home, the only element missing was the "surround sound" presentation found
in movie houses.
Fortunately, "Dolby" and "DTS" encoded material (which
include almost all movies) have the same surround sound
information encoded on home releases as the theater films.
All that is required to retrieve this information is a decoder,
additional speakers, subwoofer(s) and amps to reproduce it.
Surround Speakers
We recommend that the surround speakers play down to
70hz. The surround, or effect speakers contain critical information. In films, sound effects are vital to the director in
delivering a complete experience and the rapid technical
increase in the discreet capacity of these effects channels
has made their quality vital. This is equally true in music
play back because of the emerging high definition, multichannel music only formats. Full range instruments, voices
and ambient queues are being routed to the effects channel. In the past, some may have suggested that this was
the place to save money by purchasing small inexpensive
speakers. If you choose to do so, be prepared to upgrade
in the future.
Subwoofer
With any good surround system you will need one or more
high quality subwoofers (the .1, in a 5.1 channel surround
system). Most movie soundtracks contain large amounts
of bass information as part of the special effects. Good
subwoofers will provide a foundation for the rest of the system.
Home theater is a complex purchase and we recommend
that you consult your local MartinLogan dealer, who is well
versed in this subject.
Each piece of a surround system can be purchased separately. Take your time and buy quality. No one has ever
complained that the movie was too real. The following list
and descriptions will only give you a brief outline of the
responsibilities and demands placed on each speaker.
Front Left and Front Right
If these speakers will also be the same two used for your stereo
playback then they should be of very high quality and able to
play loud (over 102 dB) and reproduce bass below 80 Hz.
Center Channel
Many experts believe this to be the most important speaker in a home theater system, as almost all of the dialogue
and a large portion of the front speaker information is
reproduced by the center channel. It is important that the
same manufacturer of the front speakers design the center
speaker and that it is recommended for use as a center
speaker. This is not the place to cut corners.
Figure 20 Dynamo Subwoofers as the LFE (effects) channels,
MartinLogan Clarity speakers as front and surround (effects) channels,
MartinLogan Fresco as the center channel.
Home Theater
17
FREQUENTLY ASKED QUESTIONS & TROUBLESHOOTING
Frequently Asked Questions
Troubleshooting
How do I clean my subwoofer?
Use a dust free cloth or a soft brush to clean your subwoofer.
We recommend a specialty cloth (available through the
Xtatic shop at www.martinlogan.com) that cleans better than
anything else we have tried.
No Output
• Check that all your system components are turned on.
• Check that the master power switch adjacent to the AC
receptacle is set to 'On'.
• Check that the power switch on the Dynamo is set to
either 'Auto' or 'On'.
• Check your wires and connections.
• Check all interconnecting cables.
• Make sure the level control is not turned down.
• Turn off and unplug the Dynamo and check the fuse
near the AC power cord receptacle on the back. If the
fuse has blown, replace the bad fuse with a matching
T 2A L 250V fuse (T 1A L 250V if you are in a region
using 230v–240v current).
• If the problem persists, contact your dealer.
Is it safe to set things on my subwoofer?
While your Dynamo is designed with a durable, stain-resistant surface, we advise you not to set anything on your
Dynamo—especially containers holding liquids.
Is there likely to be any interaction between my
subwoofer and the television in my Audio/ Video
system?
Yes. The Dynamo subwoofer doesn’t use a shielded driver.
We recommend 3 feet between the Dynamo subwoofer and
video components that are susceptible to magnetic fields.
Will my electric bill go 'sky high' by leaving my
subwoofer plugged in all the time?
No. The Dynamo, when the power switch is set to ‘Auto’
or ‘Standby’, will draw about 13 watts when idle.
Should I unplug my subwoofer during a thunderstorm?
Yes, or before. It's a good idea to disconnect all of your
audio/video components during stormy weather.
18
Frequently Asked Questions & Troubleshooting
Muddy Bass
• Check placement. Try moving the subwoofer closer to
the front and side walls.
• Check the type of feet that are being used. Try installing
the Mini ETC spikes.
• Decrease the level.
• Check your processor setup.
• If the problem persists, contact your dealer.
Hums or Unusual Sounds
• Turn the Dynamo off, unplug all signal inputs, turn the
Dynamo back on and turn up the level. If the problem
disappears, the hum is originating elsewhere in your
system.
• Connect the Dynamo’s AC connection to the same AC
circuit as the pre amp.
• If the problem persists, contact your dealer.
GENERAL INFORMATION
Specifications
The high-resolution, servo-controlled Dynamo subwoofer
system consists of a single woofer for high SPL output with
minimal distortion. The equalization used is specifically
designed to counteract the response of the woofers sealed
box response. This equalization leads to minimal group
delay and proper transient response.
Warranty and Registration
Your Dynamo subwoofer is provided with an automatic
Limited 90 Day Warranty coverage.
System Frequency Response
25–120 Hz ± 3 dB. Anechoic through the LFE effects input.
You have the option, at no additional charge, to receive
Limited 3-Year Warranty coverage. To obtain the Limited
3-Year Warranty coverage you need to complete and return
the Certificate of Registration, included with your subwoofer,
and provide a copy of your dealer receipt, to MartinLogan
within 30 days of purchase.
Low Pass Filter Frequencies
30Hz–80Hz
For your convenience MartinLogan also offers online warranty
registration at www.martinlogan.com.
High Pass Filter Frequency
70Hz
MartinLogan may not honor warranty service claims unless
we have a completed Warranty Registration card on file!
Phase
0°, 90°, 180°
If you did not receive a Certificate of Registration with your
new Dynamo subwoofer you cannot be assured of having
received a new unit. If this is the case, please contact your
authorized MartinLogan dealer.
Components
10” (25.4cm) high-excursion, aluminum cone with extended
throw driver assembly
Amplifier
200 watts RMS
Impedance
L&R RCA – 20,000 Ohms
LFE RCA – 34,000 Ohms
Inputs
RCA Line Level, RCA LFE, Speaker Level
Output
RCA Line Level, RCA Sub Out
Weight
28.5 lbs. each (12.9 kg)
Size (Standard Down Firing Configuration)
11.7" inches W x 12.6" inches D x 13.9" inches H
(29.7cm W x 32cm D x 35.3cm H)
Size (Front Firing Configuration)
11.7" inches W x 12.9" inches D x 13.9" inches H
(29.7 cmW x 32.8cm D x 35.3cm H)
Service
Should you be using your MartinLogan product in a country
other than the one in which it was originally purchased,
we ask that you note the following:
1 The appointed MartinLogan distributor for any given
country is responsible for warranty servicing only on units
distributed by or through it in that country in accordance with its applicable warranty.
2 Should a MartinLogan product require servicing in a
country other than the one in which it was originally
purchased, the end user may seek to have repairs performed by the nearest MartinLogan distributor, subject
to that distributor's local servicing policies, but all cost
of repairs (parts, labor, transportation) must be born by
the owner of the MartinLogan product.
3 If, after owning your subwoofer for six months, you relocate
to a country other than the one in which you purchased
your subwoofer, your warranty may be transferable.
Contact MartinLogan for details.
General Information
19
GLOSSARY
OF
AUDIO TERMS
AC. Abbreviation for alternating current.
DC. Abbreviation for direct current.
Active crossover. Uses active devices (transistors, ICs, tubes)
and some form of power supply to operate.
Diffraction. The breaking up of a sound wave caused by
some type of mechanical interference such as a cabinet edge,
grill frame or other similar object.
Amplitude. The extreme range of a signal. Usually measured from the average to the extreme.
Diaphragm. A thin flexible membrane or cone that vibrates
in response to electrical signals to produce sound waves.
Arc. The visible sparks generated by an electrical discharge.
ATF. The abbreviation for advanced thin film.
Bass. The lowest frequencies of sound.
Bi-Amplification. Uses an electronic crossover, or line-level
passive crossover, and separate power amplifiers for the
high and low frequency loudspeaker drivers.
Capacitance. That property of a capacitor which determines how much charge can be stored in it for a given
potential difference between its terminals, measured in
farads, by the ratio of the charge stored to the potential
difference.
Capacitor. A device consisting of two or more conducting
plates separated from one another by an insulating material
and used for storing an electrical charge. Sometimes called
a condenser.
Clipping. Distortion of a signal by its being chopped off. An
overload problem caused by pushing an amplifier beyond
its capabilities. The flat-topped signal has high levels of
harmonic distortion which creates heat in a loudspeaker
and is the major cause of loudspeaker component failure.
CLS. The abbreviation for curvilinear linesource.
Crossover. An electrical circuit that divides a full bandwidth
signal into the desired frequency bands for the loudspeaker
components.
dB (decibel). A numerical expression of the relative loudness
of a sound. The difference in decibels between two sounds is
ten times the Base 10 logarithm of the ratio of their power levels.
20
Glossary of Audio Terms
Distortion. Usually referred to in terms of total harmonic
distortion (THD) which is the percentage of unwanted harmonics of the drive signal present with the wanted signal.
Generally used to mean any unwanted change introduced
by the device under question.
Driver. See transducer.
Dynamic Range. The range between the quietest and the
loudest sounds a device can handle (often quoted in dB).
Efficiency. The acoustic power delivered for a given electrical
input. Often expressed as decibels/watt/meter (dB/w/m).
ESL. The abbreviation for electrostatic loudspeaker.
Headroom. The difference, in decibels, between the peak
and RMS levels in program material.
Hybrid. A product created by the marriage of two different
technologies. Meant here as the combination of a dynamic woofer with an electrostatic or ATF transducer.
Hz (Hertz). Unit of frequency equivalent to the number of
cycles per second.
Imaging. To make a representation or imitation of the original sonic event.
Impedance. The total opposition offered by an electric
circuit to the flow of an alternating current of a single frequency. It is a combination of resistance and reactance and
is measured in ohms. Remember that a speaker’s impedance changes with frequency, it is not a constant value.
Inductance. The property of an electrical circuit by which
a varying current in it produces a varying magnetic field
that introduces voltages in the same circuit or in a nearby
circuit. It is measured in henrys.
Inductor. A device designed primarily to introduce inductance into an electrical circuit. Sometimes called a choke
or coil.
Linearity. The extent to which any signal handling process
is accomplished without amplitude distortion.
Midrange. The middle frequencies where the ear is the
most sensitive.
NAC. The abbreviation for natural ambience compensation.
Passive crossover. Uses no active components (transistors, ICs, tubes) and needs no power supply (AC, DC,
battery) to operate. The crossover in a typical loudspeaker is of the passive variety. Passive crossovers consist of
capacitors, inductors and resistors.
Phase. The amount by which one sine wave leads or lags
a second wave of the same frequency. The difference is
described by the term phase angle. Sine waves in phase
reinforce each other; those out of phase cancel.
Pink noise. A random noise used in measurements, as it
has the same amount of energy in each octave.
Polarity. The condition of being positive or negative with
respect to some reference point or object.
RMS. Abbreviation for root mean square. The effective value
of a given waveform is its RMS value. Acoustic power is
proportional to the square of the RMS sound pressure.
Resistance. That property of a conductor by which it opposes
the flow of electric current, resulting in the generation of
heat in the conducting material, usually expressed in ohms.
Resistor. A device used in a circuit to provide resistance.
Resonance. The effect produced when the natural vibration frequency of a body is greatly amplified by reinforcing
vibrations at the same or nearly the same frequency from
another body.
Sensitivity. The volume of sound delivered for a given
electrical input.
Stator. The fixed part forming the reference for the moving
diaphragm in a planar speaker.
THD. The abbreviation for total harmonic distortion. (See
Distortion)
TIM. The abbreviation for transient intermodulation distortion.
Transducer. Any of various devices that transmit energy
from one system to another, sometimes one that converts
the energy in form. Loudspeaker transducers convert electrical energy into mechanical motion.
Transient. Applies to that which lasts or stays but a short
time. A change from one steady-state condition to another.
Tweeter. A small drive unit designed to reproduce only
high frequencies.
Wavelength. The distance measured in the direction of
progression of a wave, from any given point characterized
by the same phase.
White noise. A random noise used in measurements, as it
has the same amount of energy at each frequency.
Woofer. A drive unit operating in the bass frequencies only.
Drive units in two-way systems are not true woofers but
are more accurately described as being mid/bass drivers.
Glossary of Audio Terms
21
NOTES
22
Notes
Notes
23
MA R T I N LOGA N ®
the loudspeaker technology company
2101 Delaware Street, Lawrence, Kansas 66046, USA
tel 785.749.0133
fax 785.749.5320
©2004 MartinLogan. All rights reserved.
www.martinlogan.com
Rev. #071904