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Upon completion of the phase alignment procedure, the subwoofer's level control can be adjusted to the desired position.Tuning Subwoofers - Calibrating Subwoofers WHY The purpose of a subwoofer is to fill in the bottom octaves below the capabilities of the mains speakers. Ideally, if you have a friend available to assist with this procedure, you can improve the outcome by listening from your favorite chair while the volume and phase adjustments are made, as the results might be slightly different between the two locations. Repeat the process for the opposite side if a second subwoofer is being used.
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Level match the volume of the main speakers and subwoofer Perform the following procedures in order, one channel at a time: Set the LP Filter to On and the LP Frequency to the desired filter frequency. Set the Crossover to On and the Crossover Frequency to the desired filter frequency. Set the LP Filter to 24dB and the LP Frequency to the desired filter frequency. If using the subwoofer's onboard low pass filter, adjust the settings as indicated below:.Set the Polarity switch to the 0 position.Turn the Phase knob fully counterclockwise to 0.For home theater systems, temporarily set the receiver or preamplifier/processor to Stereo mode.
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If using the bass management crossover in a receiver, preamplifier/processor, or outboard crossover, set the LP Filter to Off.Set the Level Mode to the Variable position, if equipped.The on-board 2-way crossover of a powered subwoofer ( E-Sub).The on-board low pass filter of a powered subwoofer.The crossover settings on an outboard active subwoofer crossover ( CR-1).The bass management controls on the receiver or preamplifier/processor.Set the desired low pass crossover frequency to be used on only ONE of the following: When performed properly, perceptible improvements in frequency response, imaging, dynamic range, and impulse response can be achieved, with distinctly audible results. When adding a subwoofer to a home theater system or two-channel audio system, adjustments of the subwoofer’s level and phase settings are critical to achieving optimum performance. Adjusting Phase Alignment between the Main Speakers and Subwoofers