Okay, so I am completely at a loss here. I recently built 12 labs, and am very impressed with thier sound.
Thier first show was 1 month ago, and they preformed stunningly, or so it seemed. QSC PL 4.0's per pair of subwoofers, so only about 1400 per cabinet or there abouts.
Then this past weekend thier second show same amplifiers, a weekend festival. About 3 hours after setup I noticed a strange sound, wouldn't you know it three subs were blown (one sub in each enclosure).
So we were down too 8 cabinets (we only took 11). The funny thing is I swear it was louder than with all 11. The array was very long (all 11 in a row, so I thought maybe it was simply due to directivity?). I had triple checked the wires to be sure everything was in phase.
2 hours later another sub goes down. Same problem burnt voice coil in one driver.
So here I am at a complete loss, I have no idea why in the world I would burn 4 voice coils. We were not even running them as hard as the show before. PL 4.0's per pair of cabinets no clipping at all.
Can anyone offer any sugestions? I will repair everything but obviously don't want this to be a recurring nightmare