The advantage of a rock steady power supply can be exaggerated. Let's say that the music momentarily requires a 40 volt level at the speaker. The amp's power supply is 80 volts nominal. No problem. Now suppose that due to prolonged high rms level signal the power supply "sags" to 70 volts. Can the required 40 volts be delivered? Sure. The transistors just turn on a bit more. In fact, 60 volts, or even 50, might be the nominal power supply voltage for a lower rated version of the amp that is perfectly capable of the 40 volt output.
Some amps are deliberately designed with a high voltage power supply lacking ability to maintain this voltage very long. This enables the amp to follow music signals much better than its continuous rms power rating would suggest.
That "rock steady" power supply is expensive, and so long as your signal is music it may be an unnecessary expense.
Some amps are deliberately designed with a high voltage power supply lacking ability to maintain this voltage very long. This enables the amp to follow music signals much better than its continuous rms power rating would suggest.
That "rock steady" power supply is expensive, and so long as your signal is music it may be an unnecessary expense.