Quad 405-2 Power Amplifier

Why this one

• Excellent condition - used, with only minor cosmetic defects
• Iconic Current Dumping design delivers 100W per channel with renowned reliability.
• A classic British power amplifier available here at a fraction of its original cost.

Condition: Excellent

This power amplifier is in excellent condition. Tested to power on; no further functional testing performed. Note: The product is in fantastic condition with virtually no surface marks or scratches. Please note: we were unable to fully test this unit as it requires a specific audio input that we did not have available at the time of testing. The amplifier powers on correctly and all controls respond as expected. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.

What's included

• Quad 405-2
• No additional accessories included

About this model

The Quad 405-2 is a stereo power amplifier built around Quad's patented Current Dumping technology, a distinctive architecture that combines a low-powered Class A amplifier - handling fine sonic detail - with a high-powered Class B circuit that supplies the muscle. The result is 100 watts per channel into 8Ω, with the amplifier able to drive loads from 4Ω to 16Ω. A carefully designed current control circuit limits peak output to 8.5A and short-circuit current to 3.1A, protecting both transistors and connected speakers without the abruptness of conventional limiting. Input sensitivity is 0.5V for full output, and the circuit uses a single op-amp for low-distortion gain and DC correction. Compact board-mounted construction with minimal internal wiring keeps the signal path clean and contributes to the 405-2's well-documented reliability and ease of servicing.

A great opportunity to own a Quad 405-2 at this price point.