So I posted a photo of a cab I built a couple of years ago in a thread here. Thing is I have played a couple of amps through it, a homemade 5 watt from the Bud kit and a DV-Mark micro CMT. No matter which amp I used playing I was bugged by how A chords sounded somewhat boomy. I thought it was the hollowbody, maybe the pickup pole pieces. It seem the the cab has a big old resonance right around 440hz, I am unsure how to handle it, maybe some rock wool?