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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 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.

• NameManufacturerCommentStockPrice PhotoOrder
• Quad 11 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£344.00
  £326.80Buy Now
• Quad 11 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£392.00
  £372.40Buy Now
• Quad 11 Eighty Mono Power Amplifier JJ KT88 6188 Upgrade Kit Pair PremiumQuad Amplifiers 5% Discount
  
  The Quad II Eighty mono power amplifier upgrade kit is for a pair of monoblock amplifiers. The Quad ...In stock£452.00
  £429.40Buy Now
• Quad 11 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 ...In stock£540.00Buy Now
• Quad 11 Forty Mono Power Amplifier JJ KT88 Upgrade Kit PairQuad Amplifiers Special Offer
  
  The Quad II-Forty mono power amplifier upgrade kit is for a pair of monoblock amplifiers. The ...In stock£214.00
  £192.60Buy Now

Specials

• 
  Marshall JCM 600 Series 50 watt Relic 12AX7WC Beijing 6N4J Pre Amp Kit
  Early Crunch Early Break Up
  
  At last a preamp set with early crunch and early break up.What you get is an ...
  £70.00  £56.00
• 
  Fender Hot Rod Deville 4 x 10 Harma STR GT 6L6GC GE Full Cryo Upgrade Kit
  Until now clear note definition, musical complexity and rich harmonic content was only attainable by using very rare ...
  £126.00  £100.80
• 
  Fender Hot Rod Deville 2 x 12 Harma STR GT 6L6GC GE Full Cryo Upgrade Kit
  Until now clear note definition, musical complexity and rich harmonic content was only attainable by using very rare ...
  £126.00  £100.80
• 
  Fender Hot Rod Deluxe Harma STR GT 6L6GC GE Full Cryo Upgrade Kit
  Until now clear note definition, musical complexity and rich harmonic content was only attainable by using very rare ...
  £126.00  £100.80
• Jackson Audio Modula£232.50  £232.00
• Jackson Audio Golden£249.17  £249.00
• Quad 11 Original REC£258.00  £193.50