Quad
405
Introduced 1975MSRP not recorded
British 100 W/ch power amplifier that introduced Peter Walker's patented current-dumping topology, eliminating output-stage bias adjustment. Plentiful and affordable on the used market, especially in Europe.
MSRP
—
Original list price not on record.
Used market · Good
$450
as of Aug 15, 2026
MSRP to used market
Price history will fill in as sales are recorded.
Specifications
- Type
- solid-state power amp
- Inputs
- line-level (DIN/RCA)
- Outputs
- speaker terminals
- Topology
- current dumping
- Weight
- 20 lbs
- THD
- 0.03%
- Power output
- 100 watts per channel into 8 ohms
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