Quad 405 Chassis Power Amplifier Faceplate PSU Spares Repairs Vintage UK Project

Quad 405 chassis, disassembled and incomplete — faceplate and PSU sub-chassis only. Spares or repairs. Everything shown is included, nothing else.

Specifications

• Audio Inputs: 2
• Year Manufactured: 1970s
• Mains Voltage: 240V
• Power Output: 100 W per channel into 8 Ω
• Amplifier Topology: Current-dumping (Class-A front-end + Class-B output stage) with feedforward error correction
• Speaker Load Impedance: 4 Ω to 16 Ω
• Input Connector: 4-pin DIN socket (stereo; DIN-to-RCA adaptor cable supplied)
• Input Sensitivity: 500 mV for 100 W output
• Frequency Response: –1 dB at 20 Hz (12 dB/octave subsonic filter); –0.5 dB at 20 kHz; –3 dB at 50 kHz
• Damping Factor: 80
• Channel Separation: 85 dB at 1 kHz
• Dimensions (W × H × D): 340 mm × 115 mm × 195 mm (13.4" × 4.5" × 7.7")
• Weight: 9 kg (20 lbs)