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Boston M 340 Manual

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10
MSubwoofer Operation
Audio On/Auto/Mute
Plug the MSubwoofer’s AC cord into a wall outlet. Do not use the outlets on the back of the receiver. Set the Audio On switch
to the desired setting.
AUDIO ON – The MSubwoofer audio is always on.
AUTO – The MSubwoofer audio will turn on whenever a signal is detected. If no signal is detected after several minutes, it will
automatically enter the Mute mode.
MUTE – The MSubwoofer is muted and will not produce any sound. You may want to unplug your MSubwoofer if you will
not be using it for some time or wish to conserve electricity. You may also turn off the main power switch, located next to the
power cord.
An LED indicator next to the Polarity switch indicates what mode the MSubwoofer is in.
OFF – The MSubwoofer is unplugged or power switch is in the "Off" position.
RED – Mute (No signal detected, Audio Off )
BLUE – Audio On (Signal detected, Audio On)
The MSubwoofer will automatically enter the Mute mode after several minutes when no signal is detected from your system.
The MSubwoofer audio will then turn on when a signal is detected.
Polarity Control
(0° or 180°): Selects regular (0°) or inverted (180°) phase for the MSubwoofer. Set this switch to provide the fullest, most
dynamic bass. The effect of phase will be most audible on low-frequency percussion instruments or music with a continu
-
ously repeating bass line.
Crossover Control
Adjusts the frequency of the low pass filter for the MSubwoofer. Note: This control is not active when using the LFE input
jack.
Volume Control
Turn the MSubwoofer Volume control to the 11 o’clock position. If no sound emanates from the MSubwoofer check the AC-
line cord, Audio On switch, Power switch, and input cables.
Adjust the MSubwoofer Volume control until you hear a match between the main speaker and MSubwoofer. Bass response
should not overpower the room but rather be adjusted so there is a natural blend across the entire musical range.
Maintenance and Service
All wiring connections should be inspected and cleaned at least once a year.
If a problem does occur, make sure that all connections are properly made, secure and clean. If a problem occurs in one
loudspeaker, rewire that speaker in a different location within the system. Should the problem persist then the problem is
with the speaker. If the speaker works fine in the new position it is a strong indication of an issue with the wiring or
electronics in the system. In the event that your speakers ever need service, contact your Boston Acoustics dealer or visit
bostonacoustics.com.
… 10 …


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