I own a set of Martin Logan Ascent speakers. I had been driving them with a Pioneer Elite VSX-45TX receiver (which only goes down to 6 ohms.) The Receiver has died and I will replace with another Pioneer Elite Receiver (VSX-84TXi), but I bought some Adcom GFA 555 amplifiers as I know they's drive the 4 ohm load of the ML speakers (they produce 325 watts/channel) into 4 ohms. The manual says they can be set up in a bridged mode and used to drive an 8 ohm load at 600 watts per channel. (Unbridged, the amp delivers 200 watts per channel into 8 ohm loads.) However, the manual says nothing about running the amp bridged into a 4 ohm load. Conceivably, the bridged set up into a 4 ohm load could be 650 watts per side.

Does anyone here know if this is too much power for the Martins? Does anyone here know if the Adcoms will not tolerate being placed into bridged mono mode for the 4 ohm application. According to the manual, the amp is equipped with a 700 watt transformer.

I appreciate your input. Thanks again.