AV123 x-cs, Руководство по использованию

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5) Begin by setting the levels of the main, center, and surround speakers one at a
time. While pointing the meter toward the speaker active with the test tone, set each
channel to the same reference level while the SPL meter remains in the listening
position. Your goal is to establish an even output level of each speaker to that spot.
Setting Subwoofer Gain
6) Once finished with the other speakers in the system, direct the test tone to the
subwoofer. Adjust its level using the gain control (labeled “VOLUME”) on the x-sub
until it reaches the SPL level achieved by the other speakers. An assistant will be very
helpful for this process because the meter location and subwoofer level adjustment
location will be different. Some like to run their sub “hot” for movies by increasing
the sub level by 5dB or so above the main channel level. This can be very effective at
lower listening levels, but be sure to use care when watching that big action movie for
the first time - especially at or near reference levels.
7) Once the subwoofer is calibrated, small adjustments can be made easily using the
subwoofer level control in your processor or receiver. If you find the need to go much
above +2 or +3 consistently, we recommend adjusting the gain control on the x-sub
upward instead and using a lower number for reference level on the processor.
x-sub/x-pls Crossover and Phase Adjustments
After setting up the system reference levels on each channel, including the subwoofer,
it’s time to set the crossover (where applicable) and the phase switch (where
necessary). This activity will round out the effectiveness of the subwoofer as an
extension of the main speakers, rather than a box in the room making noise!
Setting Subwoofer Crossover
This adjustment is between 40Hz-150Hz. If your preamplifier/processor has a dedicated
“LFE” or “SUB” output, then you should be using the input jack labeled “ SUBWOOFER
INPUT ”. This input bypasses the crossover because the filtering function is handled
upstream in the Dolby Digital/DTS processor. When your processor is not on a Dolby or
DTS source format, it will make the necessary filtering for the LFE output so this input
configuration will yield the best result for that equipment. If you have a home theater
system, this is more than likely the input you should use.
If you do not have a dedicated output for the subwoofer, you should be using the left
and right “ LINE INPUT ” jacks. In this situation it is recommended to use the adjustable