Hi all, My speakers are damaged, and I want to know why. Here's the situation: -Berhigner (sp) EP2500 amp (rated "2x1200 W @ 2 ohms, 2400 W @ 4 ohms mono bridged) -2 Harbinger Dual 15" speakers, each 600 W, 4 ohms -Usually we also hook up several 150 W monitors. Not sure on impedence I believe we usually use the amp in 'parallel mode' and plug one of the Harbingers into one channel, then daisy-chain it to the other one. The monitors are daisy_chained to the other channel. Usually, we only need the 'volume knob' at about 30% for the main (harbinger) channel and aout 15% for the monitor channel. This is on the amp, I mean. These low %s are due to the smaller venues we are accostumed to playing in. The PA is usally playing the vocals, keys(direct in), bass (direct in), and mics micing small guitar amps. Drums usually are left unmiced. I'm not sure of the exact nature of the damage, unfortunately. But I know that one of the Harbinger's 15" woofers was damaged, first the top one, then the bottom one. The harbingers have built-in crossovers. My drummer, who stores the equipment, claims that he was told (by some repair guy) that the damage was the result of underpowering the speakers and that we need another power amp. But I'm not even sure if we are underpowering the speakers, or if that can damage the speakers at all! Online info on this subject is extremely confusing and contradictory. If someone could explain a) how to even understand all these rating numbers (I'm not even sure how much power my speakers are getting, impedence confuses the hell out of me) b) what is damaging my speakers c) what to do about it. Thank you!!!