Products > Amp Audio Upgrade Kits > Quad 11 Power Amplifier Series

Our audio upgrade kits offer a selection of the best quality modern production items along with high quality new old stock valves to give you a an improved sound and a cost effective upgrade. We have over 30 years’ experience with using and listening to high end audio amplifiers and over 25 years in improving the valves. These kits have been put together after many hours of listening tests to confirm the valves performance in any given application.

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  • NameManufacturerCommentStockPrice PhotoOrder
  • Quad II Classic Amplifier Harma KT66 Retro Mullard EF86 Upgrade Kit PairQuad Amplifiers The modern remake of the legendary Quad 11 power amplifier that shot the company to fame and fortune.The Mullard EF86 ...In stock£300.00Buy Now
  • Quad II Eighty Mono Power Amplifier JJ KT88 6SL7 Upgrade Kit Pair Quad Amplifiers The Quad II Eighty mono power amplifier upgrade kit is for a pair of monoblock amplifiers. The Quad 11 Eighty is an ...In stock£385.00Buy Now
  • Quad II Eighty Mono Power Amplifier JJ KT88 6188 Upgrade Kit Pair PremiumQuad Amplifiers 10% Discount

    The Quad II Eighty mono power amplifier upgrade kit is for a pair of monoblock amplifiers. The Quad ...
    In stock£445.00
    £400.50
    Buy Now
  • Quad II Eighty Mono Power Amplifier Gold Lion KT88 6188 Upgrade Kit Pair PremiumQuad Amplifiers The Quad II-Eighty mono power amplifier upgrade kit is for a pair of monoblock amplifiers. The Quad 11 Eighty is an ...Sold Out£517.00Buy Now
  • Quad II Forty Mono Power Amplifier JJ KT88 Upgrade Kit PairQuad Amplifiers The Quad II-Forty mono power amplifier upgrade kit is for a pair of monoblock amplifiers. The Quad 11 Forty is an ...In stock£208.00Buy Now
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All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by all EU countries.


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