I've heard that subsonic filters should be used on a ported enclosure. How exactly does it help you, and how is it adjusted on an amp that supports it?

 

With a ported box you don't want to play frequencies that are much lower than the tuning of the enclosure... You can adjust the subsonic dial to filter out the frequencies below whatever point you want so they aren't reproduced by the woofer, so you don't **** things up.

 

Ahh so it's basically a HPF in a way. So if I had my LPF on the amp at 80hz for the sub, I could set the Subsonic filter at like 30 or something like that.

Thanks for the info I completly understand

 

That's my interpretation of it anyway.

 

Yup, you got it correct.

 

Subsonic is not really a word. Just a catch word someone came up with that happened to stick, it is really infrasonic filter.
Yes infrasonic filters will allow you to essentially band-pass your subwoofer(s)
by cutting off your low end frequencies.

 

^ Blame Audio Control for that.

 

30's n lows, 30's n lows,,

Captain SubSonicFilter says, "NO"

 

You got it.

It is a great feature to help protect subwoofers that cannot reproduce the lowest octaves of sound.