KT66 Valves – JJ Matched Quad NEW TESTED (4 X KT66)

4 X KT66 Matched Power Valves


In Stock

498 in stock

SKU: AMP0412 Categories: ,

All single valves, matched pairs and matched quads are fully tested in our warehouse before dispatch. These valves will guarantee awesome tone and amazing power. You WILL hear the difference. So get your amp sounding better than ever. Order your replacement valves today.


4 x KT66 JJ Power valves for guitar amplifiers and hi-fi equipment

The JJ Electronic KT66 is a superb and very faithful reproduction of the original KT66 valves.

The second you pick one of these tubes up you know it is going to sound amazing. It is beautifully manufactured with robust construction and a thick glass envelope. It is a valve that is made to last.

What does the KT66 sound like?

The JJ KT66 delivers a powerful 25 Watts of sonic heaven with plenty of headroom.

The valve has an immediate warmth and richness. It can be described as having a fuller balanced sound than the more commonly found 6L6GC.

You may wonder why these valves are not more common in guitar amplifiers. The answer is amplifier manufacturers, desperate to keep costs down, either use cheaper valves, inferior Chinese valves – or both. Not a single amplifier manufacturer makes their own valve so this is just a cost to them.

It’s a real shame because these valves sound absolutely amazing.

4 x Matched KT66 tubes – a perfectly matched quad

These are selected Premium grade valves for superior tone, power and performance.

  • Every valve kit is carefully chosen and digitally matched before we ship to you.
  • We have 30 years in the business so you are in very safe hands.
  • All valves are fully guaranteed.
  • We offer a range of shipping options with tracking and full insurance.

Additional information

Weight0.78 kg
Dimensions26 × 21 × 17 cm


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4 X KT66 Matched Power Valves

KT66 Valves – JJ Matched Quad NEW TESTED (4 X KT66)