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, decadently brought
to you by Bruce Zinky and Dave Koltai.