Quad 405 Power Amplifier

We are pleased to offer for sale this used Quad 405 Power Amplifier.

It has been professionally repackaged to ensure safe delivery with mains cable included.

This has been tested and is in full working order. It is sold with a 3 month warranty.

The general cosmetic condition is average. There is some pitting on the top of the unit, and some marks and scratches. Please see images for further details.

FREE national courier delivery.

***Important Delivery Information***

This item will be sent using DHL's secure PIN delivery service.

A current mobile phone number must be provided when placing your order, as DHL will send a delivery PIN directly to this number. This PIN must be given to the courier at the time of delivery.

Without the PIN, the courier will not be able to hand over the parcel.

Why Buy... from us? Because all of our items go through a full inspection, get serviced (if required), PAT tested for electrical safety, deep cleaned and all come with a warranty. We are 100% committed to customer care and are always on hand pre or post-delivery for technical help and advice.

The Quad 405 is a renowned British stereo power amplifier, first released in 1975. It is celebrated for its innovative engineering and has become a sought-after classic among hi-fi enthusiasts and collectors.

This amplifier is recognised for delivering a clear, natural sound with exceptionally low distortion. Its performance is underpinned by the revolutionary "Current Dumping" circuit, a patented design that utilises a feedforward loop.

The "Current Dumping" topology employs a precise low-power Class A stage to manage the audio signal, while a higher-power section provides the necessary output for demanding signals. This approach effectively minimised crossover distortion, a common issue in amplifiers of the period, and ensured stable operation with various speaker loads.

- Power Output: 100 watts per channel into 8 ohms
- Total Harmonic Distortion: Less than 0.01% at 1 kHz
- Signal-to-Noise Ratio: 95 dB
- Input: 4-pin DIN
- Speaker Terminals: Spring-loaded
- Weight: 9 kg