Accuphase E-600 - Balanced Remote-sensing; Signal-line and GND-line Sensing; Improved Harmonic and Intermodulation Distortion

Remote-sensing is the technique to lower the output
impedance of amplifier by the negative feedback with
signal sensing from close up the speaker terminals.
Balanced Remote-sensing is the technique to make
impedance even lower by GND sensing and the negative
feedback of GND level with adding the signal sensing.
Not only Damping-factor is improved but also Total
Harmonic Distortion and Intermodulation Distortion get
better by Balanced Remote-sensing.
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