AVS Forum Special Member
Join Date: Dec 2007
Location: Southern California
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The subwoofer and main speakers cannot operate in a synchronized manner within the same frequency range. Frequency "overlap" between the subwoofer and mains is always detrimental to the sound.
The drivers are located at different physical locations and have different physical responses, because they are not identical.
This makes it impossible to prevent them from operating out-of-phase with each other, and some cancellation of their outputs always results, which ruins both the impact and clarity of the system bass.
If you have main speakers that go down to 50 hz, for example, you must make sure that the subwoofer only operates below 50 hz.
You can TRY to minimize cancellation by using the phase control of the subwoofer and moving the sub to different locations, but eliminating the frequency overlap completely is the most effective answer to the fundamental problem. Even a small amount of phase difference "smears' the bass and you get "muddy" unclear bass as a result.
IF you have Teensy main speakers that only go down to 120 hz, then the only solution is to run the subwoofer up that high, but that sucks. That means your bass is monaural up to 120 hz, which emasculates the music.
You want front speakers that go down to 60 hz or lower for nice sound quality, and a subwoofer that fills in the frequencies below.
That is WHY it is CALLED a SUBwoofer! Its ONLY legitimate purpose is to fill in the f region BELOW the LF cutoff point of the main speakers.
Trying to use it any differently causes problems.