Can a Gryphon stereo amplifier pass DC? Gryphon’s technical specifications online do not provide the +/- roll-off points, they simply specify the frequency response being 0-350 kHz or 0-400 kHz. That would lead me to believe that any of Gryphon’s better amps are capable of passing DC.
Gryphon amplifiers are capable of passing DC. However, they won’t do it for longer time in order to protect the loudspeakers. Gryphon has DC-servo circuits built-in which will remove DC-content from the signal. If one for some reason puts a higher level of DC into the amplifier than the DC-servo can remove, the error detection circuit will shut the amplifier down in order to protect the loudspeakers.