6
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Adjust the PHASE switch on the subwoofer’s control panel to determine which position sounds the most
natural. The difference should be most audible in the mid-bass. If you cannot detect a difference, leave
the PHASE switch in the 0° (in-phase) position.
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If you have placed your subwoofer's Crossover Bypass switch in the OFF position adjust the
FREQUENCY ADJUST knob and determine what position sounds best. This feature controls the output
level of the mid and upper bass frequencies. Please note that if you have put your subwoofer's Crossover
Bypass switch in the ON position, due to the low pass filter already in your receiver, the subwoofer's
frequency adjust control is unnecessary, will have no effect, and its position can therefore be ignored.
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The best VOLUME level, PHASE switch and FREQUENCY ADJUST positions will mostly be determined
by your room acoustics and the mid and upper bass frequency response characteristics of your front
speakers. The source material will also play a significant role as its bass level may vary considerably.
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After your initial adjustments you may want to go back and “tweak” these controls. Their effects are
acoustically interrelated. Re-adjusting them may be necessary to obtain optimal performance. Generally,
once you are satisfied with your subwoofer's settings, you can use your receiver’s tone, equalizer, volume
and subwoofer output level controls to optimize your whole system’s performance.
VERY IMPORTANT!
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If you have a Dolby Pro-Logic Home Theater system, make sure that your receiver’s center
channel mode is in the NORMAL position. This will ensure that all low bass information is sent to
your subwoofer.
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If you have a Dolby Digital (AC -3) or DTS Home Theater system, make sure that you have
correctly configured your receiver's Bass Management System so that all of your speakers are
properly categorized as either SMALL or LARGE. This will ensure that all appropriate low bass
information is sent to your subwoofer. As a general rule, a speaker with an 8" or greater
diameter woofer may be considered LARGE. Conversely, a speaker with a woofer less than 8" in
diameter may be considered SMALL. Please note that the bass output of a dual woofer speaker
could be comparable to that of a larger single woofer speaker. Example: A dual 6.5" woofer
system would generally be considered LARGE since its woofer area approximates that of a
single 10" woofer system.