Here's the deal: I'm running a Genz-Benz GBE-600 into an Accugroove El Whappo. The amp's pushing 425 watts @ 4 ohms, the cabinet can handle 800. I'm always careful not to let the amp clip as this can cause speaker damage. Practice on Thursday was fine. No problems. At a gig on Saturday, as soon as I plugged in and started tuning, the 12" speaker started farting at me. Here's my question: What could have caused the speaker to blow?? Nothing was changed between Thursday and Saturday, except me LOWERING the volume for stage monitoring vs. practice. No loud pops, no clipping, I've never pushed it too hard...does anyone have any idea what may have happened, or has anyone had a similar experience?? Thanks.