Eldartford wrote: "Almarg...I don't agree with your description of the power supply as "weak". It may have been designed that way."
I'm not sure what you disagree with. Nobody designs power supplies for class AB amps to be able to sustain sinewave at full power for unlimited time - otherwise it would require heatsinks and transformer of the size of class A amp. This would not make any sense since average music power is only few percent of max power. Power supplies being much smaller are already compromised (weak). Al is just saying that within given power supply size (wattage) you could design for higher output voltage (getting better headroom) sacrificing output current and making it weaker for average power demand.
I'm not sure what you disagree with. Nobody designs power supplies for class AB amps to be able to sustain sinewave at full power for unlimited time - otherwise it would require heatsinks and transformer of the size of class A amp. This would not make any sense since average music power is only few percent of max power. Power supplies being much smaller are already compromised (weak). Al is just saying that within given power supply size (wattage) you could design for higher output voltage (getting better headroom) sacrificing output current and making it weaker for average power demand.