

This amp is in pretty nice condition for the age. It was used in a home studio driving a set of Bose 800 speakers. Top of the cabinet could use painted.
Check out the google reviews. The Crown Power Line Four (often associated with the PS-400) is a rugged, vintage professional/audiophile power amplifier released in the early 1980s. It is highly regarded for its. Robust build, massive toroidal transformer, and extremely low distortion. 165 watts per channel RMS.
265 watts per channel RMS. Less than 0.05% from 20 Hz to 20 kHz at rated output.
Less than 0.01% at rated output. 112 dB below rated output.
Greater than 400 (from 10 Hz to 400 Hz). 48.3 cm W x 17.8 cm H x 25.7 cm D (19" x 7" x 10.125). 24.9 kg (55 lbs). Short, mismatch, and open-circuit proof. Features controlled slew-rate limiting and a low-frequency interrupt to protect the amp and speakers. Selectable taps for 100, 120, 200, 220, and 240V 50-400Hz AC.