Which setting for subsonic filter

[toyopl 10+ year member]

I have 2 amps and both have subsonic filter.

1 amp will drive subs in a ported box tuned around 30-35hz, so from reading the forum I gather that it should be set anywhere from 20-30hz ?

The other amp is 4 channel and will drive components up front and coaxials in the back, do you use the subsonic filter for that ? or should it be turned all the way down ?

Is subsonic filter only for subs ?

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[KBCnick 10+ year member]

subsonic=tuning.

 

[justafifteen 10+ year member]

subsonic=tuning.

Shouldn't it be a little below tuning so that you don't cut off your tuned box freq? Like my box is tuned at 38hz so my subsonic is at 30 so that I don't damage my sub

 

[supermaxx123 10+ year member]

subsonic filter just filter out frequency's which are useless. In other words, frequencies that your subs cant produce. I would use a test tone and see where you get excursion but no sound. Start high and go low and set it that way. For mids, i use my highpass filter...

 

[toyopl 10+ year member]

yes I have no clue how to set the amps at all, but I thought start one setting at a time.

So no subsonic for regular speakers, just for subs ?

 

[supermaxx123 10+ year member]

well the high pass is somewhat a subsonic. I filters out lows. A sub is already lowpassed but we need to filter out the "too" low frequencies also. I would say yes to both. Filters are designed to protect speakers from frequencies they were never meant to produce, or that can damage them.