QII-Forty
Quad Scos din vânzare

QII-Forty

The QII-Forty is a 40 W RMS valve power amplifier that revives the classic QUAD II design with updated components and a new transformer. It uses KT88 output valves in push-pull and suits modern loudspeakers, including electrostatic models.

  • 40 W RMS valve power amplifier
  • Two KT88 output valves in push-pull
  • 4 Ohm and 8 Ohm loudspeaker taps
  • New transformer design and upgraded components
  • Frequency response 10 Hz - 30 kHz (+0 dB, -0.5 dB)
  • Suited to modern speakers including QUAD ESL
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Fotografii

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Descriere

The QII-Forty is a stereo-style valve power amplifier based on the classic QUAD II concept. The circuit topology differs slightly from the original, and the components are of a higher grade. A newly engineered transformer is fitted. The aim is a fast, crisp and detailed sound while keeping the balanced character of the original, with enough output current to drive modern loudspeakers, including QUAD's own ESL models.

The output stage uses two KT88 valves in a push-pull configuration. The input stage uses two 6SH7 valves and a 5U4G valve handles rectification. Rated output is 40 W RMS, with total harmonic distortion of 0.3% at full power and 0.03% at 1 W.

Speaker connection is through 4 Ohm and 8 Ohm taps, which allows a range of loudspeaker configurations. Input sensitivity is 1 V RMS, and maximum power consumption is 180 VA.

Specificații

Marcă
Quad
Model
QII-Forty
Categorie
Hi-Fi și audio pentru casă › Amplificatoare

Audio

Model
QII-Forty
Power output
40W RMS
THD @ 700Hz
0.3% @ 40W
THD @ 700Hz (low level)
0.03% at 1W
Residual hum and noise
Better than -80dB
Frequency response
10Hz - 30kHz (+0dB, -0.5dB)
Damping factor
20 @ 700Hz (referred to 8 Ohms)

Inputs

Input sensitivity
1V RMS

Outputs

Loudspeaker taps
4 and 8 Ohms

Valves

Input valves
2 x 6SH7
Output valves
2 x KT88
Rectifier valve
1 x 5U4G

Power

Power consumption
180VA maximum

Date: quad-hifi.co.uk; fotografii: Quad product page · actualizat 2026-10-14 · Ai găsit o greșeală? Scrie-ne