"Pooh Bear" wrote in message
...


Arny Krueger wrote:

"Pooh Bear" wrote in message
...


Arny Krueger wrote:

When distortion is below about 0.08%, there just isn't any way to hear
it.

I used to think you could read a spec sheet that way too.

Unfortunately most thd specs are measured at power levels that are
unrepresentative of normal listening.

What sort of deviation are you talking about?

Deviation ? Funny word to describe it.

Say, an amplifier's thd is measured @100W yet typical listening level may
be
~ 1W. The data sheet thd is essentially useless. For many amplifiers the
1W
region is just about the worst possible listening level on account of
crossover issues.

It's been maybe 30 years since I've seen a SS amp in good repair that
demonstrated crossover distortion. Sure, simple measurements show THD+N
increasing at low levels, but it is the hum and noise that drives the
measurements up. This includes cheap IC chips, cheap receivers, and cheap
autosound amps.