The Rotel RB-1590 Stereo Amplifier is not lacking in power. In normal operations with both channels in use the Class AB design amplifier is set to deliver an ample 350w to 8Ω loudspeakers with a minimum impedance compatibility of 4Ω. There are few speaker systems this amplifier will not be able to handle. With a solid build comprising in-house custom made transformers & high efficiency capacitors expect top of the line performance every time.