James Loudspeakers EMB - Manual (Page 6)

PHASE CONTROL - This switch pennits you to set or reverse the subwoofer
output to o (in phase) or 180 (out of phase). This will correct for possible
mismatch (boominess or lack of output) between the subwoofer and your main
speakers. The best way to make this adjustment is to listen and pay close
attention to the low frequency output. The correct position will produce clear and
even bass response. Most often the correct setting will be at "0".
CROSSOVER BYPASS SWITCH - If your A/V receiver or processor has an
internal 80 Hz or 100 Hz subwoofer crossover, we recommend setting this switch
to 'Bypass'.
VARIABLE CROSSOVER ADJUSTMENT - (set the Crossover Bypass Switch to
'Variable') The crossover adjustment control permits you to adjust the upper
limit of the subwoofer frequency response from 40 - 150 Hz. The subwoofer's
output response will roll off above the frequency limit you set. Set the crossover
frequency so that there is a smooth transition from the subwoofer to the main
speakers. Keep in mind that if your main speakers are smaller units with limited
low frequency output, you may want to select a higher frequency (i.e. 100-120
Hz) than you would with larger main speakers. If you have larger main speakers,
we suggest you start by setting the crossover adjustment at about 80 Hz, or
possibly lower.
GAIN CONTROL - To balance the output of your subwoofer to your main
speakers adjust the subwoofer Gain Control to the one-third (1/3) position and
then adjust accordingly.
POWER SWITCH - Master on/off power.
AUTOMATIC POWER ON / OFF - With the Power Switch on, the subwoofer will
automatically turn itself on (green light) when it senses an audio signal. After
about 10 minutes without a signal, the unit will automatically switch to a standby
mode (red light).
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