How to adjust the KLIPSCH Reference R-112SW?

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The KLIPSCH Reference R-112SW has several controls to adjust it to your setup:

Gain Control (LEVEL) - Adjust the subwoofer's volume level to match your main speakers. Start at the midpoint position, then gradually increase until the sound output from the subwoofer matches that of your main speakers.
Low Pass Filter (LOWPASS) - Adjustable frequency from 40 Hz to 160 Hz. For large speakers (floor-standing): set between 50-90 Hz. For small speakers (bookshelf/satellite): set between 90-150 Hz.
Phase Switch - Two positions available: 0° or 180°. Test both to determine which provides the strongest output at your listening position.
Power Switch (POWER) - ON position for continuous power, AUTO for activation upon signal detection, OFF to disable.

A green LED indicator on the front baffle shows the operational status of the subwoofer.

User manual KLIPSCH Subwoofer : user manuals and guides in PDF