It's a new amp:
Ampeg | GVT15-112 Tube Amp - Tube Guitar Amplifier
The boys at Loud, having thoroughly screwed up the Ampeg legacy so far, have gone back to the well with a new series of amps that borrow heavily from the cosmetics of the Unimusic era of Ampeg amps from 1968-1972. I haven't had a chance to check these new ones out yet myself, but I'm very familiar with the older ones. I look forward to checking them out at NAMM.
This new amp is a small 15 / 7.5 watt combo, probably great for solo/duo work but underpowered if you're working with a drummer IMO.
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FWIW, old Ampeg amp circuits are dead easy to work on right up until the introduction of the relatively complicated VT-22/V-4, VT-40/V2, and SVT. I have a few combos from the Unimusic era. Some basic info, in case you come across any of these used:
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- Reverb-o-Jet (@18 watts, 1x12, too small and bright for jazz IMO)
- GU-12 (@20 watts, 1x12, excellent for jazz, like a Fender Princeton Reverb)
- G-12 (@22 watts, 1x12, excellent for jazz, like a Fender Deluxe Reverb)
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- G-20 (35 watts, 2x10, better for rock and blues IMO, like a Fender Vibrolux Reverb)
- GV-22 (35 watts, 2x12, great for jazz, like a Fender Pro Reverb)
- GV-15 (35 watts, 1x15, great for jazz, like a half-power Fender Vibrosonic Reverb)
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- VT-40 (60 watts, 4x10, a rock amp, no real Fender equivalent)
- VT-22 (120 watts, 2x12, great for jazz, like a Fender Twin Reverb)