It's not a matter of the first few watts. It is a matter of how the electrical frequency response changes based on the speaker.
A perfect amplifier has a flat electrical FR, regardless of the speaker. A weak amp may have it's FR adulterated by the speaker crossover, and that happens even before 1 watt.
Here is a measurements page from a Prima Luna design, to see what I mean:
https://www.stereophile.com/content/primaluna-prologue-premium-power-amplifier-measurements
You don't need an ideal amplifier to have good sound. Goodness knows most tube amplifiers barely meet this requirement, but it is a good indicator of the current drive, and guts of the amp.
Nelson Pass does make a related, but not the same, point about the first watt being most important. But he's talking about noise and distortion. He, rightfully, states that Signal to Noise at 1 watt is a far more important gauge of sound quality than Signal to Noise at full power (which we never spend time listening to).
Best,
E
A perfect amplifier has a flat electrical FR, regardless of the speaker. A weak amp may have it's FR adulterated by the speaker crossover, and that happens even before 1 watt.
Here is a measurements page from a Prima Luna design, to see what I mean:
https://www.stereophile.com/content/primaluna-prologue-premium-power-amplifier-measurements
You don't need an ideal amplifier to have good sound. Goodness knows most tube amplifiers barely meet this requirement, but it is a good indicator of the current drive, and guts of the amp.
Nelson Pass does make a related, but not the same, point about the first watt being most important. But he's talking about noise and distortion. He, rightfully, states that Signal to Noise at 1 watt is a far more important gauge of sound quality than Signal to Noise at full power (which we never spend time listening to).
Best,
E