III. RESULTS
All measurements of the audio performance of the amplifier
were gathered using an Audio Precision System One test
set. The distortion measurements quoted are THD N (total
harmonic distortion plus noise) measured over a 22 Hz–80 kHz
bandwidth. The 80 kHz upper frequency will include more
noise, but is necessary to capture the harmonic distortion
components of tones at the top of the audio spectrum. All
measurements were taken with regulated V supplies and
an 8 load.