Open Box (Mint) Supro S6420+ Thunderbolt Plus 35W 1x15 Tube Guitar Combo Amp
Tube Combo Guitar Amplifiers
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Super-simple controls, but plenty of versatility.
The Supro Thunderbolt Plus amplifier adds switchable power-amp topology to the legendary 1964 Supro Thunderbolt, giving you the original 35-Watt “Class A” Cathode bias sound as well as beefy 45-Watt and 60-Watt Grid bias modes for additional headroom and tonal variation. This unique design is implemented via a three-way selector switch on the front panel.
Normal and extra-hot input options, combined with a wide range of available gain on tap, allow you to fine-tune the texture and response of this amp’s massive sound. Turned all the way up, the Thunderbolt exhibits nearly zero self-noise, yet it puts out enough volume to be easily heard on large venue and theatre stages, with overdrive completely controlled by the guitar’s volume knob. The 35-Watt and 45-Watt modes both deliver the sag and bluster of the 5U4 tube rectifier while the 60-Watt mode uses a silicon rectifier to unleash maximum Thunderbolt power. The 60-Watt mode’s faster transient response and ample headroom is wonderful for pedals, and brings the Supro sound loud and clear to any size venue.
Massive custom transformers and lightweight, vintage-correct cabinetry—combined with the best sounding 15” guitar speaker money can buy—put the Thunderbolt in a class of its own. With the amp turned all the way up, chords ring with exceptional clarity and definition amidst copious amounts of tube overdrive and output-stage saturation. The variable power switching found in the Thunderbolt Plus model is an over-the-top hot-rod custom luxury guitar experience.
- Power: 35 watts (Class A, with tube rectifier); 45 watts (Class AB with tube rectifier); 60 watts (Class AB with silicon rectifier)
- Tubes: two 12AX7; two 6L6; one 5U4
- Single channel
- Two inputs
- Speaker: 1x15 Supro TB15
- Controls: tone, volume, 3-way power-amp switching knob
- Blue Rhino Hide tolex
- Dimensions: 23.6 in. x 19 in. x 10.5 in.
- Weight: 45 lbs.
- Assembled in the U.S.A.