DIY subfilter

[MAMMOTHvolume]

Currently in the proccess of making one of these myself, gonna be a bit of a caveman approach With a 3rd of 4th order highpass tunable between 20 - 60Hz, thinking around 50ish will be the good spot.

Wondering if anyone else has made one and what did you go for circuit wise etc.

 

[Tyand]

Ive Seen an schematic on fsb. do a search. I wanted to mod this and build IT. But no money atm. Updates on your work would be Nice. Greets Daniel