It was recently suggested to me that I can Bridge at 4 ohms with my QSC USA 900. To the best of my knowledge this amp is rated to handle 4 ohms per channel and 8 ohms bridged. Does anyone have any thoughts on this? What type of danger does pushing this type of load present? Do I run the risk of frying my amp or will it protect itself? This panel has been extremely helpful to me and I anxiously await your thoughts.