Early model Grace M101.
Only used in non-smoking environment
VERY clean preamp.
One Channel.
This has the "High Gain" (HG) option -
Stepped gain knob 20 to 70 dB. Front panel markings are 10-60 dB but actual gain is 20 to 70 dB. Good for ribbon or other low-output microphones.
High-Z input with 0-50 dB gain
Variable output trim
LPF, Phantom
includes external supply (Wall Wart). Power supply is 120V, 60 Hz only.