What are your experiences out there with high powered power amps, 1000 watts and higher? I am looking for comments on both power amps and various preamps. I run an SWR Bass 750 to power my custom built cabinets that run inefficient bass drivers that are dead flat to 28 Hz. This is a fundamental design tradeoff between high SPL (loudness) vs low frequency extension. I wanted low frequency response, and choose to make up for it with a higher powered amp. My SWR 750 runs at full Gain, and about 3/4 maximum Master Volume, so it is fast approaching the out-of-gas point. Yes, I already know that 10x the amplifier power is required to sound twice as loud.