I did some RMAA tests on my TotalBitHead @1Vrms into 33 ohms, and I think got the amp section results fairly close to what's shown at IF somewhere in
hereThe noise spectrums look close too me. THD + N I think IF had 0.0133%, and I got 0.0132% (L) 0.0142% (R) (A-weight and less otherwise). In IMD I think IF show more, but that maybe because Tyll got to up to 48 kHz, and mine go only upto 20 kHz. The spectums look close to me from 0 to 20 kHz...
Frequency Response
Noise Spectrum
THD
IMD
Frequency response (from 40 Hz to 15 kHz), dB | +0.54, +0.03 | Good |
Noise level, dB (A) | -94.3 | Very good |
Dynamic range, dB (A) | 93.1 | Very good |
THD, % | 0.0099 | Very good |
THD + Noise, dB (A) | -77.1 | Average |
IMD + Noise, % | 0.012 | Very good |
Stereo crosstalk, dB | -68.7 | Good |
IMD at 10 kHz, % | 0.011 | Very good |
General performance | | Very good |
Not "the best" across the board, but it's a pretty good amp IMO. Very practical. Though it does seem to roll of a little on the lows. With my laptop it can sometimes get noisy, probably due to the USB interface. Like the crossfeed option and like the fact that it can drive two cans. More than enough power for the cans I use. I like it also for personal reasons and IMO it's a classic.