do i need a Subsonic filter

[Zash 10+ year member]

I realize that I want 26.25hz but since they don't have exactly 26.25hz, would I want to get a 20hz or 30hz model?

 

[JimJ 5,000+ posts]

if your box is tuned to 35 Hz, I'd just get a 30 Hz SSF, I usually set mine at 5 Hz below tuning anyway...

 

[ANeonRider 10+ year member]

Then pick the FMOD closest to it.

Woah

 

[RandyJ 10+ year member]

Just for future refrence though, if you have a box that is tuned ultra low, like mine which is tuned to 24Hz, you wont need one, unless you play 15Hz test tones all day. They are un needed for sealed boxes also.

You sub will still play below 30Hz just no where near as loud.