AVS Special Member
Join Date: Dec 2007
Location: Southern California
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The front speakers are designed to go down to around 35 Hz, according to KEF.
There is no way you should be limiting them to frequencies above 80 Hz (or 100 Hz; that is obviously your problem. That is absolutely ridiculous.
They should not have ANY low-frequency limit imposed on them by the receiver or software!
The front speakers should operate from 40 Hz to 20 Khz.
The center speaker should be set to go down to 120 and no lower; you don't want any bass from it.
The subwoofer has a low-pass filter setting on it; set it for beween 40 and 50 Hz, so it only operates BELOW the frequency response of your main speakers. Make small adjustments in the setting for best system sound, but keep it below 60 Hz.
ALSO; Step One in setting any system up is to turn off or disconnect all but the front 2 speakers, and get those front speakers positioned so they sound the best in the room...by themselves.(no limiting or filtering or anything)
If you don't take some time doing Step One, you will never get your system to sound its best.