Wow, thanks for the reply A9x-308!!

That explains a whole lot. Makes sense. So it really has more to do with the source, and the volume at which it was recorded, which means one can't calculate how much wattage is being used at a particular MV setting.

I do need to research the calculations and equations you posted, because I don't understand them. Thank you to all who posted, I do appreciate it.

On another slightly unrelated note, a question concerning power supply sections on amps. I took a look at SoundAndVision amp tests and I wanted to ask you guys a question. I looked at Yamaha amps, Denon amps and Onkyos, but for some reason the Yamaha amps post very poor results when running all channels simultaneously on the test bench. Denon and Onkyo models post numbers that are usually much higher.

An example :

Onkyo NR828 ($1099)

2 Channels Continuously Driven, 8 ohm loads 147 watts

2 Channels Continuously Driven, 4 ohm loads 204.4 watts

5 Channels Continuously Driven, 8 ohm loads 109.9 watts

Yamaha A-1020 ($1200)

Two channels driven continuously into 8-ohm loads:

0.1% distortion at 113.5 watts

1% distortion at 129.2 watts

Five channels driven continuously into 8-ohm loads:

0.1% distortion at 63.9 watts

1% distortion at 73.2 watts

Denon E400 ($599)

2 Channels, 8 Ohms 130.0 watts

2 Channels, 4 Ohms 93.3 watts

5 Channels, 8 Ohms 70.0 watts

7 Channels, 8 Ohms 62.3 watts

Yamaha RXV-A730 :

Two channels driven continuously into 8-ohm loads:

0.1% distortion at 115.5 watts

1% distortion at 134.7 watts

Five channels driven continuously into 8-ohm loads:

0.1% distortion at 32.4 watts

1% distortion at 67.2 watts

Seven channels driven continuously into 8-ohm loads:

0.1% distortion at 27.1 watts

1% distortion at 33.3 watts

So my question is, why do the Yamaha amps post such poor numbers in these tests, where the other brands seem to be doing much better?