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10 Argent Place Ringwood VIC

Quad II Eighty


Mono Block Valve Power Amps

Quad II Mono Block Power Amplifiers in Champagne

Quad II Mono Block Power Amplifiers in Champagne

A Modern Reinterpretation Of A Quad Classic

The Addictive Delicacy Of Valves With Quad's Magical Midrange and Dynamics To Make You Jump

Traditional Quad Champagne Finish

One Pair Only - Ex Display

Availability: In Stock

Your price $6,800

Save $8,199 (Normally $14,999)

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Product Description


The Quad II-eighty is a revitalised and more powerful version of Quad founder Peter Walker’s 1950s original classic the Quad II but now given a circuit make-over and a strong dosage of steroids via valve wonder-engineer Tim De Paravicini. 'The closest approach to the original sound ...' has been a Quad philosophy since 1936. More than just a slogan, it underlies the company's commitment to producing the finest audio equipment, capable of reproducing all the elements and emotion of a live performance.


A modern classic and designed by valve supremo, Tim De Paravicini, the II-eighty is much more than representing homage to the Peter Walker classic - it's a complete re-interpretation of the philosophy. Using 4 x KT-88s and a similar cathode coupled output, the lineage is clear to hear and see, but with such huge dynamic headroom, this amp is faster and with more control than any previous model.

Some Technical Stuff

The Quad II Eighty valve amplifier is the perfect partner to Quad’s ESL speakers. Designed by one of the most famous tube amplifier designers in the world, Tim de Paravicini, Quad II Eighty takes inspiration from the original Quad II amplifier.

It is an 80 Watt mono power amplifier following in the tradition and philosophies of Peter Walker. The output section consists of 4 KT88 valves running as two pairs in push pull with the hallmark Quad topology of partial cathode loading in the output transformer.

This method reduces distortion when compared to the usual ultra linear or triode methods, however it does require a greater grid driving voltage, achieved using a balanced pair input stage.

The output transformer was designed to improve high frequency performance and accurately balance the push pull halves. Also, the transformer was designed to make sure that full output is realised at the base frequency down to 20Hz.

Each output valve has its own cathode resistors to provide reliability and self matching. The screen grids of the KT88 valves are run from a lower voltage, again for good reliability. The whole amplifier has a total of only 16dB of feedback providing good stability into virtually any known loudspeaker and especially the famed Quad electrostatic speakers.

In The News

Here is a revamped and re-engineered version of an amplier with an enviable heritage; the Quad II. Tim De Paravicini has taken the classic Peter Walker design, modernised the assembly and cosmetics, elevated the power output and updated its sonic qualities. Effectively, De Paravicini has retained the legacy midrange magic and has improved the overall sonic and physical package to an extent that would make Peter Walker proud. With the Quad II-Eighty, excellence has become truly immortal. 

Australian Hi-Fi Magazine - Edgar Kramer

  • Design: Mono Power Amplifier
  • Power Output: 80 Watts RMS
  • Frequency Response: 10Hz - 30kHz (+0dB, -0.5dB)
  • Impedance: 4 Ohms or 8 Ohms, selectable
  • THD @ 80 Watts 0.5% - 30Hz - 15kHz
  • Residual Hum and Noise Better than -94dB
  • Damping Factor 16 @ 1kHz (referred to 8 Ohms)
  • Valves (per channel): 2 x 6SL7, 1 x 6SN7, 4 x KT88
  • Finish: Traditional Quad Champagne
  • Nett Weight: 21kg each
  • Dimensions (WxHxD): 390 x 185 x 195mm each
  • Manufacturer's Warranty: 2 Years on Electronics, 3 Months on Valves

Additional Information

Additional Information

Name Mono Block Valve Power Amps
Brand Quad
Finish/Colour Champagne
Shipping Weight (kg) 44.0000
Price Range $14,999


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