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QUAD 405 - 1981 - SERIAL 56582 - BOARD NUMBER M12368 ISS 10

The device is restored without making any changes to its design. It's a Excellent device whose Musicality is still at the top Today. This device Works with speakers Brand Elipson, 3 channels, bass reflex.

Great consistency of the stamps, the sound scene is ample and without aggressiveness of the treble. A quality vintage amplifier.









Results: The review was well needed.

The capacitors 100/16 and 47/40 were defective. One of the 2 capacitors of 10,000 UF was defective. If you look at the photograph, the top of the component is pierced. Imagine the change in the sound level!







Film capacitors have Kept very close values. I changed them despite everything hoping to improve the sound restitution.






Adaptation with printed circuit board on capacitors "SNAP-IN"
Adaptation for their fastenings with PVC plumbing pipe diameter 50.















Download M12368-ISS9-10 Schematic



beware this pcb does not have the original plot