My "Bailey" amps (Wireless World c. 1970) have lots
of internal resistances, all soldered in neatly by hand.

In your comment below, I think that you have "output"
much "impudance".


"Reg Edwards" wrote in message
...
The phrase "output impedance" in connection with amplifiers is ambiguous
and
likely to result in arguments.
The correct description is "internal impedance" or "internal resistance"
and
should always be used.