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MartinLogan Descent [8/20] Channel multi channel mode

Using an A/V processor and the Descent’s low pass filters.

You may wish to set up the Descent so that it can be used

in both a traditional 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 Descent

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 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.

2 Connect the LFE/0.1 subwoofer output of the processor

to the LFE input of the subwoofer using either an RCA

or an XLR interconnect.

Recommended Control Settings (see figure 7):

1 Set your front left and right 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).

2 Set the low-pass filter switch to 40Hz if your front speakers

are floor-standing speakers. Set it to 70Hz if your front

speakers are bookshelf speakers.

3 While playing music with bass content, turn the level

control up until the music has deep extended bass that

is not overwhelming.

4 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).

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 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.

6 Use the bass management section of your processor to set

the subwoofer level at an appropriate level while multi-

channel content is playing. Follow the instructions in your

processor manual to fine-tune the subwoofer level.

2-Channel/Multi-Channel Mode

8 Connections and Control Settings

Figure 6. Signal Connection for 2-Channel/Multi-Channel mode.

Figure 7. Control Settings for 2-Channel/Multi-Channel wide mode.

MartinLogan Descent [8/20] Channel multi channel mode

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