DSJR
Major Contributor
Not too long ago, a notorious UK reviewer from the 80's returned to test a niche headphone amp, based on a 15WPC or so amp circuit with a sodding great resistor from the amp out to the headphone +ve terminal. 0.03% distortion (-70dB) was judged a good figure, as was the obviously high output impedance (thanks heavens most headphones seem to have a flat (ish) impedance curve)..Yes, I'd forgotten about the valve amps. Strange looking back, as he liked to emphasise measurements for other stuff.
Nah, it's all eye candy these days as the cases are where much of the money goes methinks...