This hybrid 2.1 stereo tube amplifier combines current technology with a classic design of the past. Utilizing the efficiency of solid-state Class AB amp topology and a vacuum tube preamp section, this unit has an output power rating of 50 watts per channel at 4 ohms. The front panel has VU meters, a large volume knob, complete with bass and treble controls. It also features Bluetooth 5.0, built-in phono preamp, mono RCA sub output, input connections including USB, optical, coaxial, phono, stereo RCA and short circuit protection to prevent amp failure.