High-Pass Filter on Vented Enclsoure

69stingray · 22nd June 2006, 02:05 AM

Hello everyone, I have a question!

Lets say you have a MTM speaker with 4" Drivers. It is in a vented enclosure. The design calls for these speakers to handle 80 Hz and up (below 80 Hz is a sub).

Any reason why you can't put a high-pass filter on the woofers to keep sub-80 Hz signal out of them? Wouldn't a high-pass filter also help prevent the cone from over-excursion when driven below the tuning frequency?

infinia · 22nd June 2006, 02:18 AM

Yes, I do this all the time. It really helps the midrange sound, seems less congestion. It's fun to play with the crossover point and listen to the resulting sound.

ocaukrell · 22nd June 2006, 02:19 AM

no reason at all.
in the old days it was called a sub sonic filter, they worked fantasticly on turntables.
Yes would help protect the drivers.
Might take a few components to get a steep enough filter though.

noah katz · 22nd June 2006, 02:26 AM

Most every AV receiver has the 80 Hz HP built in.

22nd June 2006, 02:18 AM	#2
infinia diyAudio Member Join Date: May 2005 Location: Californication	Yes, I do this all the time. It really helps the midrange sound, seems less congestion. It's fun to play with the crossover point and listen to the resulting sound. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

22nd June 2006, 02:19 AM	#3
ocaukrell diyAudio Member Join Date: Aug 2005	no reason at all. in the old days it was called a sub sonic filter, they worked fantasticly on turntables. Yes would help protect the drivers. Might take a few components to get a steep enough filter though. __________________ Buy my g'friends Swarovski crystals, you know you want to New Car and Home audio for sale, click the for sale button

22nd June 2006, 02:26 AM	#4
noah katz diyAudio Member Join Date: Jul 2004 Location: Mountain View, CA	Most every AV receiver has the 80 Hz HP built in. __________________ ----------------------------------------- Noah

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