3 channels guitar studio head with 3 different preamps and 3 EQ curves.
knobs: GAIN, BASS, MIDDLE, TREBLE, VOLUME, MASTER, DEPTH, PRESENCE
switches: CHANNEL, BOOST, GATE, EQ SHIFT, PREAMP/HEAD, POWER.
REAR: REC OUT, SEND, RETURN
SPEAKER: 4/ 8 /16 Ohm
Tubes: 10x12AX7, 2x6L6
Output power 30W
inside trimmers list: 1-trebles boost, 2 -bass boost, 3-volume boost, 4&5 -bias (set +0.035V on pin8 for both power tubes), 6 -power amp fat, 7-hum (factory set no need to rotate)