I'll never forget my wakeup call on the differences of sound between amplifiers. I had been listening to headphones on my Techniqs receiver, a well regarded uni

I'll never forget my wakeup call on the differences of sound between amplifiers. I had been listening to headphones on my Techniqs receiver, a well regarded unit with a THD of 0.04%. For some reason I plugged the headphones into my Nakamichi cassette recorder instead, and was blown away by how much better they sounded. Until then I had thought that amplifiers were a solved problem and the inaccuracies of transducers like headphones would mask the tiny differences between them. I never expected to be wrong.