Almost all of the features of it's bigger brother, the R55, with 40 watts of EL34 power, (5) 12AX7 preamp tubes, housed in a extra deep open back enclosure and fitted with a Celestion G12L-55 rear mounted speaker.
All Rivera 4 Models follow
Granted, like all amps, this isn't for everyone. But if you want a great boutique quality amp with fantastic sound and construction, give this a shot.
It is complete with a new design: high gain, powerful, unlimited sustain, massive bottom end, gigantic headroom for rhythm, assignable effects loop, amazing new Foundation control, distortion with definition and edge, highs without harshness but with full body, and low noise. It's the highest gain of any amp in the market.
For my purposes, this is a very good power amp. I've been a professional player for a long time now, and this is about the best my rig has ever sounded.