I recently picked up a Mesa Boogie Powerhouse 4x10 from a pawn shop for 300 bucks out the door. I also just purchased a used SVT 3 PRO for $250 from the old Facebook Marketplace today since I am upgrading from an Ashdown Electric Blue 180. It just can not cut through when I am placed next to my drummer (he plays very softly, yet still I couldn't hear myself). The top left speaker has a very subtle rattle to it. Almost sounds like there is something rattling around in it. When I increase the bass it gets worse. My thought is that it is the voice coil within the speaker, but I would like to hear some other opinions as well. When I press on the speaker no scraping or scratching occurs. Thanks so much in advance!