Try one of these. I've never used one but read many a member mention that it fixed the problem you're having.It’s a b-stock directly from PSA. It has a 5 year warranty. However my Yamaha receiver doesn’t play nice with it, which is resulting in little to no output so it’s going back. I’m considering getting dual Kuda from DIYSG when they’re ready to ship out. Likely dual 15” as dual 18” would be overkill for an apartment. Or maybe a single 18” for now.
I’m worried I’ll have the same receiver output issues with another sub.
ART Cleanbox Pro