[Eeyore]

flipper wrote:

Building my nephew's guitar amp raised a question for me. Looking at
fender schematics I noted their test criteria (and measured voltages)
were with all pots 'centered'. Not a problem for the guitar amp as I
used the first rule of engineering: plagiarize.

It did make me wonder what position on the volume knob people design
their 'Hi-Fi' power amps around. Nominal power (whatever that means)
at 'mid scale'? Max power at pot maxed? And vs what input level?

Makes for a significant gain issue as 'mid scale' to full open is
20dB.

17dB for the JIS A taper ( 15% ) actually.

Of course, there's also 16-20dB of content above the nominal
316mV CD input level too.

What 316 mv ? CD output FSD should be 2V. That is 16dB above 316mV it's true.

Graham