Woofer/Amplifier questions

Take two different amplifiers;

Amplifier #1

100w into 8 ohms
200w into 4 ohms
400w into 2 ohms

Amplfiier #2
100w into 8 ohms
100w into 4 ohms
100w into 2 ohms


Amplifier #1 is a conventional design where power doubles
as impedance halves.

Amplifier #2 is a breed that monitors load and lowers the rail
voltages to maintain the same power regardless of load.


Two questions.

1. If amplifier #2 has variable rail voltages, would clipping
occur sooner at 2 ohms vs. 8 ohms load? Suppose rails are +40v/-40V
at 8 ohms, and +20v/-20v at 2 ohms. I argue that you would
clip easier on transients at 2 ohms vs. 8 ohm, others say
100w = 100w, makes no difference.

2. Woofers have an impedance curve that varies with frequency.
Hypothetical -> if an 8 ohm woofer's impedance is 2 ohms
at 60hz, does amplifier #1 output 400w @60hz whereas amplifier #2
only outputs 100w across all frequencies, in which case, people
may interpret amplifier #1 as driving woofers better due to
more power ?




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