I've got an Acoustic 106, loaded with EV 15-Ls. I'm wondering about lining it with some insulation, because after hearing a room mix of a jam it sounds heavily 'Boxy' in the low mids... there's some hollow-sounding resonance that's annoying there and I'd like to flatten that out. I've found a few walls-worth of good ol' 2" pink does a wonder. Anybody in the know about that, esp with this cab? It's low and wide, has never had insulation. Also, I'm mulling over trying to fit port tubes into the round vents in the baffle. The EVs are in good shape but I don't push then too hard... maybe I could get a little more at middling volumes if I tuned those vents?... Thanks for reading.