Subsonic setting confused

[AL210]

I'm a little confused on this setting. For my AQ amp they say to set this at 30-35 hz. Won't that block everything below this setting? How do you guys set this up?

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[Buck 5,000+ posts]

It depends on what your box is like and what woofers you have. Setting it can be difficult, like trying to find the exact spot you want it to be at. I would try it at 30 hz or so and back it down some from there until you are happy or scared for your sub one.

 

[AL210]

It depends on what your box is like and what woofers you have. Setting it can be difficult, like trying to find the exact spot you want it to be at. I would try it at 30 hz or so and back it down some from there until you are happy or scared for your sub one.

You guys built my box so do you still think to start with 30? What can happen if its set too low?

 

[Buck 5,000+ posts]

You guys built my box so do you still think to start with 30? What can happen if its set too low?

Ah yea. With a sealed box, it's going to be harder to reach mechanical limits, which is a big part of the SSF- it keeps your woofer from playing too low and bottoming out (mostly in ported). In that sealed box, you should be able to put it pretty low. It's kind of hard to tell you where to put it though, I would just experiment.

 

[mat3833 10+ year member]

depending on the woofer, enclosure size, and power you may not need the subsonic filter. my 12" TC9 based sub can run in 1.39 cubes sealed with the subsonic off on ~1K. generally you set the subsonic at the subs Fs value. my sub has a Fs of ~24hz. lol

Matt

 

[T3mpest 10+ year member]

Yeah if it's a sealed box unless your really overpowering the woofer and listen to alot of C&S music I'd leave it off. Especially if it only goes down to 30hz as that's just going to leave you -3db at 30hz for no real reason.