what is DC leakage? Can it rip my Revel M20?

I just bought a pair of Revel M20. After 10 minutes of play (not loud), I noticed one of the woofer, the rubber seal start to get ripped. At that time, I was using an acurus A100 amplifier with an acurus act3. I cant recall if the M20 had the rip before I play or not. So I wonder if this is caused by DC leakage from my AMP? if so, how do I measure or find out? Since then, I got that woofer replaced and now I have the speakers hook to my other (dedicated) system and everything is OK. I am afraid to hook them to the previous system. I still have the A100 but not the ACT3. I know it is not the ACT 3 since I used it before without incidents. The A100 is brand new (and is the first time I plug in). Could it be the DC leakage or something else from the AMP? I would like to find out if my AMP is still OK. Any help is appreciated.