Simultaneous 2-Channel/ Multi-Channel Mode

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Simultaneous 2-Channel/ Multi-Channel Mode

The advantage of this dual mode is that you are able to achieve an optimum setup for stereo listening and still allow for multi- channel (movie) mode listening. When listening to stereo source material the system achieves optimum music integration. In this mode the subwoofer plays only below the front main speaker’s lowest response frequency. While in movie mode the LFE track and the bass from the surrounds can be fed to the subwoofer using crossover settings from the processor’s bass management system.

Signal Connection:

1Connect the left out/right out from your processor to the Left In/Right In of the subwoofer. Use quality RCA interconnects, XLR interconnects, or speaker level connections. Use either RCA or XLR interconnects, or speaker level connections, but choose only one connection method—do not use multiple methods of connection at the same time for left/right inputs. Speaker level connections are discussed in detail later in this manual.

2Connect the LFE output of the processor to the subwoofer’s LFE In. Use quality RCA or XLR interconnects. Please note, the connection method for the LFE In does not need to match Left In/Right In. If you used RCA interconnects or speaker level connections for Left In/Right In it is acceptable to use XLR for the LFE Input. Be flexible, experiment, and listen to determine what sounds best in your unique installation. Do not use mul- tiple methods of connection at the same time for the LFE input.

Recommended Control Settings:

IMPORTANT! If you intend to use PBK (Perfect Bass Kit) room correction we recommend running PBK and optimizing placement of your subwoofer prior to adjusting the subwoofer’s controls. When engaged, PBK will affect the acoustic output of your subwoofer and as a result influence the settings described below.

1Set your processor controls for front speakers to wide, large, or full mode. If your front speakers are small (e.g. bookshelf type speakers) we recommend that you not use this method for con- necting your subwoofer and instead refer to the “Multi-Channel Mode” section. Set processor controls for center and effects type speakers to narrow, small, or limited mode. Remember, few center and effects type speakers are designed to go much lower than 70Hz, which means that any bass information in a soundtrack lower than this frequency will be lost. When you set your center and effects type speakers to narrow, small, or

limited mode, all of the bass lower than the assigned crossover point will be redirected to the subwoofer along with the LFE output—guaranteeing that no bass information from these chan- nels is lost.

Please note: some processors allow the changing of speaker configuration based on source material type. Under these conditions the user may want to run the fronts in narrow, small, or limited mode for multi-channel source material and run the fronts in wide, large, or full mode for 2-channel stereo source material.

WARNING! Based on the performance of most processors it is recommended that MartinLogan center and effects type speakers 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.

2Calculate the number equal to 70% of your main loudspeak- er’s lowest frequency rating. Set the Low-Pass Filter knob to a setting equal to the resulting number. If the resulting number is lower than 30Hz, set this knob to 30Hz.

If you are using a Custom Low-Pass filter you do not need to adjust this knob. When the Custom Low-Pass button is acti- vated it will override the Low-Pass Filter knob.

3Play familiar music with bass content and turn the level control up until the music has deep bass that is not overwhelming.

4Try the phase control in different settings until the best blend- ing is obtained. Play familiar music with deep, repetitive bass. Adjust the phase control so the bass notes seem their loudest and without blur when heard from your typical listening posi- tion. If you are augmenting MartinLogan loudspeakers, we suggest you start with Phase set at 90° when experimenting. If you are using a Custom Low-Pass filter, we suggest you start with the Phase set at 0°. Custom Low-Pass filters provided for these subwoofers are already phase optimized.

5With multi-channel source material playing, use the bass man- agement section of your processor’s speaker setup to set the subwoofer level at an appropriate level. Follow the instructions in your processor’s manual to fine-tune the subwoofer level.

6If your processor offers the option to setup crossovers for a subwoofer, we recommend that you start with the following

26 Connections