Great condition, works great.
I don't have the original user manual but I can offer a pdf copy from the Peavey website.
Below is a description of the amp head.
Thanks for looking, Dan
The Peavey 3120 gives rock guitar players a triple-threat tone onslaught with generous amounts of gain, 120 watts of power and three fully independent channels of all-tube, tone-shaping satisfaction.
The Lead and Rhythm channels feature gain and volume controls and an active three-band EQ, while the Clean channel offers nicely rounded tones crafted by a passive three-band EQ and volume control.
A global master volume governs the amount of power put out by its four EL34 or 6L6GC power-amp tubes, while the gain controls on the Lead and Rhythm channels adjust the amount of 12AX7 gain saturation.
The 3120 rear panel hosts a unique Peavey custom tone control feature: a three-setting damping switch that alters speaker resonance to create tight, medium and loose tones, from a precise punch for rhythmic attack to a full, widely resonant sound.
Also on the rear panel is a foot switchable effects loop with dedicated send and return controls and a line out with level control.
Features:
120 watts into 16, 8 or 4 ohms (switchable)
Four EL34 and four 12AX7 tubes
Power amp switchable to use EL34 or 6L6GC tubes
Three footswitchable channels
Clean channel features volume, bass, mid and treble controls
Rhythm channel features gain, volume, bass, mid and treble controls
Lead channel features gain, volume, bass, mid and treble controls
Master volume control
Damping switch for tight, medium or loose response
Foot switchable effects loop with send and return controls
Line out with level control
Made in the U.
S.
A.