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. Rich and fat low end, and spongy sweet mids and highs for an overall pleasing tone. Like most Rivera amplifiers, features include 2 fully independent preamp channels, each with it’s own distinct voicing (British and American), and footswitchable boosts delivering 4 easy to dial up sounds, preamp-power amp patch loop, and line out. This amp sounds much bigger than it’s size, and is affordably priced. Get some “Chub” in your life!