Home Speaker Asylum

General speaker questions for audio and home theater.

RE: Why no high pass filter on some subwoofers?

I have a Rel Strata III that does not have a HP filter. This is fine for me as I run my Magnepan 3.7i full range and just use the sub to fill in the bottom octave (LP filter set to 38 Hz). If you want to take the "load" off the main speaker then an HP filter would be needed - most HT processors provide this but the standard stereo preamp does not. If you need/want a HP filter, insertion of a single cap (C= 1/(2*pi*f*R), at the input jack of the amp, will suffice (R= input impedance of the amp and f= desired frequency).



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