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MartinLogan Descent [6/20] Connections and control settings

CONNECTIONS AND CONTROL SETTINGS

Setting up most subwoofers can be an extremely difficult and

confusing task. MartinLogan engineers designed the Descent

for easy setup and system integration. Before beginning to

connect your Descent, please review the controls discussed

in the last section. An understanding of these will help speed

you along as you connect your Descent with your system.

All signal connections are done at the signal input section on

the rear connections panel of the Descent. Make certain

that all of your connections are tight.

WARNING! Turn your Descent subwoofer off

before making or breaking any signal connections!

2-Channel Mode

This setup is recommended if your Descent will be used in

a 2-channel only system. When a signal is connected to the

Descent’s Left/Right Inputs, the Descent’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 Descent using quality RCA

interconnects. If your preamplifier only has one set of out-

puts you may need to obtain Y adapters from your dealer.

Recommended Control Settings (see figure 3):

1 Set the low-pass filter switch to 40Hz if you have floor-

standing speakers. Set it to 70Hz if you have bookshelf

or effects type speakers.

2 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.

3 Try the phase control in different settings until the best

blending is obtained. If you are using the Descent to

augment other MartinLogan products, we suggest you

start with the phase set at 90° (0° if you are using Script™

loudspeakers).

4 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 music. Try to find a

position that sounds correct to you. Experiment by chang-

ing 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 Descent

6 Connections and Control Settings

Figure 2. Signal Connection for 2-Channel mode.

Figure 3. Control Settings for 2-Channel mode.

MartinLogan Descent [6/20] Connections and control settings

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