change in mid-bass output. The correct position will have a higher amount of
apparent mid-bass output.
LEVEL: This control allows you to adjust the output level of the subwoofer to match the
main speakers in your system. We recommend starting with the LEVEL knob set to
the THX position and then calibrate your system with your AV receiver, surround
preamp/processor, or SPL meter. The THX position corresponds roughly to a 0dB
setting.
For most home theater receivers and surround sound processors, set the LEVEL
knob to point straight upwards (in the 12 o'clock position). For music systems, start
with the LEVEL knob at a low setting and increase it slowly from there until the
audio level matches that of the main speakers. The use of test tones (from a
receiver/processor's built-in calibration function or test disc) and an SPL meter is
suggested for proper level matching of all speakers.
CROSSOVER: Set this switch to the THX (OFF) position when using a modern audio/video
receiver to bypass the subwoofer's crossover settings. Use the ON setting to use the
subwoofer's built-in crossover, which is set using the CROSSOVER knob.
EQ: Set the EQ switch to the THX position to have the subwoofer perform within the THX®
certified parameters. When set to the EXTENDED position, the subwoofer will use
your amplifier's equalizer, with the result that the output level will be slightly
louder, but with more distortion. Experiment to find which setting you prefer.
POWER: Use the POWER switch to determine whether the subwoofer's will always remain
on or if it will automatically go into standby mode after 30 minutes of no audio
input.
LED INDICATOR: The LED will illuminate green when the subwoofer is powered on and will
illuminate red when the subwoofer is in standby mode.
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