Wayne, To be more clear with my question: When running regular music at high power levels, would you recommend 600W (or close) for extended periods? In my estimation, the protection lamps light at a somewhat lower power level, and is that level a better place to quit twisting the volume knob to the right? I realize the differnce between 300W and 600W isn't much (3dB), but in any case the question was about gross indicators of "enough", not questioning your designs. Chris