The Quad II-forty power amplifier is much more than a tribute to one of the most famous designs in audio – but refined and powerful in the modern sense of the terms. Although the circuit topology has changed a little from the original, significantly better components and a brand new transformer design have been engineered.
While still being delicately balanced a fast, crisp and detailed sound is achieved, whilst producing an output current suitable for modern loudspeakers, including our very own ESL. KT-88 output valves work in a push-pull configuration, while a choice of 4 Ohm or 8 Ohm taps allows for a wide choice of loudspeaker configurations.
The Quad II-Forty retains the elegance of the 1950s Quad II but with a level of sophistication, a build quality and finish rarely seen on any product old or new. The chassis has been substantially increased in size to accommodate the much larger components, all of which are hard wired by hand following a similar topology to the original.
The modern listener demands a higher output than the fifteen watts of the original Quad II. The new Quad II-Forty uses larger output valves, KT88s instead of KT66s, and a more robust power supply utilising a 5U4G rectifier valve. The input valves are now military specification 6SH7s instead of EF86s.
Designed for the music lover, the QUAD II-forty power amplifier is a direct descendant of the legendary QUAD II amplifier designed by Peter Walker, founder of QUAD and one of the guiding lights of early Hi-Fi reproduction. Like the QUAD II, the QUAD II-forty uses the uniquely simple and timeless circuit topology developed by Walker.
Whilst the QUAD-II forty retains the layout and styling of the QUAD II, the chassis size has been increased to take the substantially larger components including mains and output transformers.
All Quad products are expected to last a lifetime and even longer. Many Quad customers still derive immense pleasure listening to products built over fifty years ago. These new amplifiers are no exception and with periodic servicing and a caring hand you can expect the performance of these amplifiers to continue for many decades to come.
30 day warranty included; matched pair - some scratches and paint chips - please see photos; includes original packaging.
New price $7,999 per pair.
THD @ 700Hz
0.3% @ 40W
0.03% at 1W
Residual Hum and Noise
Better than -80dB
10Hz - 30kHz (+0dB, -0.5dB)
20 @ 700Hz (referred to 8 Ohms)
4 and 8 Ohms
2 x 6SH7 Input
2 x KT88 Output
1 x 5U4G Rectifier
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.