MartinLogan Speaker user manual Channel Mode, Signal connection for 2-channel mode

WARNING! Turn the Master Power switch Off and unplug it before making or breaking any signal connections!

2-Channel Mode

This setup is recommended if your subwoofer will be used in a 2-channel only system. When a signal is connected to the subwoofers Left In/Right In, the Low Pass Filter control is active.

Signal Connection (see figure 4):

1Connect the left out/right out from your preamp/receiver to the Left In/Right In of the subwoofer. Use quality RCA interconnects. If your preamp/receiver only has one set of outputs you need to obtain Y adapters from your dealer.

Recommended Control Settings (see figure 5):

1Calculate the number equal to 70% of your main loud- speaker’s lowest frequency rating. Set the Low Pass Filter switch to the closest setting below the resulting number.

2Play familiar music with bass content. Increase the Level control until the music has deep extended bass. Be careful to avoid levels that become overwhelming.

3Try the phase control in different settings until the best blending is obtained. If you are using the subwoofer to augment other MartinLogan products, we suggest start- ing with the phase set at 90°.

4If you have completed steps 1–3 and still have weak or boomy bass, adjust the 25Hz Level and 50Hz Level knobs to compensate for these anomalies. Experiment with the controls and listen to the effects. Try to find a position that sounds correct to you. Experiment by changing the Level control while adjusting these knobs. Find a position that gives you deep extended bass and good blending with your main speakers.

Figure 4. Signal connection for 2-channel mode.

Figure 5. Adjust these controls for 2-channel mode.

Controls and Connections 9