Ok, so my mesa deisel 4x10 blew a speaker. Had it reconed the repair guy did a good job on the cabinet other than one odd looking driver compared to the other three lol. Got it home played for a while cabinet sounded great. Back to its punchy aggressive goodness but after I played a while the volume would drop for a short period of time and then restore itself back to normal. I'm assuming it can't be the cabinet just an assumption mind you, the amp is a mesa 400+ any idea's?