Reason Amps SM-20 Combo:
The Reason Amps SM20 is a combo and was fashioned after its bigger brother, the SM40. It features independent Normal and Bright channels, each voiced to deliver wonderful vintage tones in "plug n' play" fashion. Additionally, it delivers a third channel or mode, called StackMode
The StackMode feature on the amp sets it apart from any other amp on the market. Using StackMode will allow you access to a broad range of sounds including some that are simply not possible on other vintage voiced amplifiers. Furthermore, StackMode allows you the ability to adjust unique parameters through its simple control set and interactive features.
Output: 20 watts RMS @ 10% THD
(2) EL84 output tubes, in Class A Cathode Biased configuration
(2) 12ax7 preamp tubes
5U4 Rectifier tube (GZ34 may be suited for higher plate voltage)
3 way Stack switch - Normal, Stack, Bright
Normal channel Volume, Tone
Bright channel Volume, Tone
StackMode Bright & Normal channel controls are active, Stack Volume & Hi-Cut
Oversized extra capacity power supply
Harmonics Switch - works in the final output stage to change the harmonic structure of the overdrive.
Independent output jacks for 4,8, 16-Ohm operation