RHYTHM MASTER – 1 x 15"
For those players who love the huge, bold sound of the 1x15" Thunderbolt amp, but need a lush, all-tube reverb to fill out their sound, Supro presentsthe 1675RT Rhythm Master amplifier.
Rooted in Supro tradition, this vintage inspired model is loaded with
independent bass and treble controls, six-spring long pan reverb,
output tube tremolo and switchable Class A / Class AB power amp wiring
for 35, 45 or 60 watts of vintage American tone.
The Rhythm Master’s USA made custom 15” driver is the most accurate
and true sounding 15” guitar speaker on the market, with a full,
broadband sound that is never muddy. To create this signature speaker,
we worked with Eminence to combine the best elements of our favorite
vintage 15” speakers (Jensen C15PS & JBL D130) with modern
construction methods and materials to achieve a vintage voiced driver
with superior power handling and juicy bottom end.
The unique power amp topology of the Rhythm Master not only allows
for players to change the texture and output volume of the amp but it
also provides two very different, all-tube tremolo effects depending on
whether Class A (cathode bias) or Class AB (grid bias) mode is selected.
The cathode bias tremolo is vintage Valco/Supro all the way, where the
overall depth of the effect changes along with the dynamics of your
playing. The grid bias tremolo is gives a much deeper, stronger and more
pronounced throbbing effect. Since the tremolo is performed by
modulating the bias of the output tubes, the reverb necessarily comes
before the tremolo effect, for a mesmerizing combination of pure tube
reverb and tremolo when both effects are combined.
• Switchable Class-A (35 Watts)
or Class-AB (45 / 60 Watts)
• Independent Bass & Treble controls
• All-tube reverb
• Output-tube tremolo
• Tube or Silicon Rectifier
• 6L6 power tubes
• 1×15 Supro TB15 speaker
• 5U4 Tube Rectifier
• Blue Rhino Hide tolex
• Assembled in NY, USA
• Engineered by Bruce Zinky,
Thomas Elliot and David Koltai