QUAD 405

Second-hand, it has some scratches (see pictures). Without its original package.
Power amplifier Quad

Specifications
Two-channel, "current-dumping" solid-state power amplifier.
Rated output: 100Wpc into 8 ? (20dBW).
Frequency response: -1dB at 20Hz (12dB/octave subsonic filter), -0.5dB at 20kHz, -3dB at 50kHz.
Sensitivity: 500mV in for 100W out.
Power bandwidth: 10Hz-20kHz.
Damping factor: 80.
Channel Separation: 85dB at 1kHz.
Dimensions: 13.4" (340mm) W by 4.5" (115mm) H by 7.7" (195mm) D.
Weight: 20 lbs (9kg).