rotel rb 1590RB 1590 Reference Stereo Power Amplifier The RB 1590 is Rotels flagship stereo power amplifier and is designed for systems where high current capacity, stability at low impedance, and low distortion are essential. With 350 watts per channel into 8 ohms and up to 648 watts into 4 ohms, the RB 1590 delivers a power reserve capable of driving even demanding speakers in large rooms. The design is based on a full Class AB topology, a dual monoblock layout,