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Hsu has custom high pass filters

I've been constantly recommending the use of a high pass filter, along with plugging main speakers when ported, as the best way to integrate subs to main speakers but never  really thought about it much besides using a single series cap.

Today I stumbled across this nifty and cost effective product while considering some new subs.  The advantage of the active high pass is you get 12 db/octave instead of just 6 db/octave.  This can help remove existing, bad speaker/room interactions and improve the ability of a sub with EQ to work.

Hsu will custom make a high pass filter with 2 crossover points.  For instance, you could do 40Hz and 80 Hz.

 

erik_squires

Showing 1 response by erik_squires

erik_squires OP
16,592 posts
 

To the point of slopes, I think THX had the best idea when they attempted to use the speakers + active crossovers to achieve Linkwitz-Riley 4th order filters.  The idea is that the sealed satellite speaker, crossed at 80 Hz would naturally produce a 2nd order Butterworth filter.  Add another such filter, at the same point with the same slope and you get a combined LR-4th order.

This is cool because now you can mate it directly with a subwoofer with a 4th order LR filter too and have perfect matching. 

Of course, many reasons why we can't do that today, and we rely on DSP in the subwoofer chain to deal with any discrepancies.

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