Quad II Forty Mono Valve Power Amplifier (Pair)
You can earn loyalty points on every order you place on this website. If you select to create an account at checkout, your loyalty points will be saved and you can use these to discount future orders online.
Each product page shows you how many loyalty points you can earn when you order that item. Essentially, for each £1 you spend, you earn 1 loyalty point and for every 1 point earned, 1p will be added to your loyalty point balance (this is the same as some of the UK's biggest loyalty point cards). So for example, if you spend £500, you'll earn 500 loyalty points which can be used to discount a future order by £5.00.
Features
| Manufacturer | Quad HiFi |
|---|---|
| Warranty The length of time your product is protected by warranty | 3 Years |
Tech Specs
- Power Output 40WRMS
- THD @ 700Hz 0.3% at 40W
- THD @ 700Hz 0.03% at 1W
- Residual hum/noise: >-80dB
- Freq Response 10-30k Hz (0/-0.5dB)
- Max Power Consumption: 180W
- Damping Factor 20 @ 700Hz (8O)
- Loudspeaker taps 4 Ohm, 8 Ohm
- Input Valves 2 x 6SH7
- Output Valves 2 x KT88
- Rectifier Valve 1 x 5u4G
- Sensitivity 1VRMS
- Dimensions (HWD): 185 x 200 x 390mm
Description
Quad II Forty mono monoblock power amplifiers shares the sophisticated elegance of the original Quad II from the 1950's, but its been updated, to be more refined, with an excellent build quality and finish.
The first significant improvement is with the chassis, it is larger to accommodate the new larger components, which are wired by hand, following a similar topology to the original.
Input Valves
The modern listener demands more power than the fifteen watts output of the original Quad II. The new Quad II-forty has used larger output valves, KT88s replace the KT66s and the power supply is more sturdy, utilising a 5U4G rectifier valve. The input valves on the new Quad II forty are so good that they are military grade 6SH7s instead of the previous EF86s.
Lifetime Use
All Quad products are expected to last a lifetime, or even longer. Many Quad buyers are still using their original amplifiers, that were built over half a century ago, and they still derive immense pleasure listening with them. This new amplifier from Quad, is no exception, it has the ability and quality to last 50+ years. With Quad products, if you undertake regular servicing and you give it the care it deserves, you can expect these amplifiers to perform for many decades to come.
Elegant Finish
Supplied in the Lancaster Grey finish pictured. A perfect match paired with the Quad QC24 valve pre amplifier and/or Quad ESL 2812 or ESL 2912 speakers.
































