KT77 Valve JJ Matched Quad TESTED NEW

4 X KT77 Matched Valves


In Stock

470 in stock

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.


Buying a Matched Quad of KT77 Valves.

Looking to buy a matched quad of KT77 valves?

We sell the superb JJ KT77 valve. JJ is one of only five manufacturers of valves in the world. So don’t pay more for rebranded versions of exactly the same valve from the same factory in a different box.

  • Every one of our valve kits is carefully selected, then fully tested and digitally matched before we ship them to you.
  • These Selected Premium Grade valves deliver superior tone, power and performance across the range.
  • We offer a range of fast delivery services with full tracking and insurance.
  • We have 30 years experience in the industry so order with confidence.
  • Global shipping – we ship all over the world.

Why Use a Matched Quad of KT77 Valves?

In a guitar amplifier with four output valves, in simple terms two valves are pushing the speaker cone and two are pulling it. So in an amp with two output valves, the same applies but the amp has half the power.

With the same signal applied it’s vital that each valve gives an identical amount of push or pull. If this was not the case, sound fidelity would be lost. A matched quad of KT77 means each valve gives the same bias current under identical conditions of plate voltage and grid bias voltage.

Please note that valves (same make, same type) can differ wildly in their characteristics, hence this matching is required.

So you MUST replace all four output tubes at the same time and you should buy your matched quad of KT77s from a reputable dealer.

Matched Quad of KT77 valves/tubes.

A quad of matched JJ KT77 valves for top of the range guitar amplifiers.

The KT77 valve is a much sought after guitar amplifier valve and is highly regarded by guitarists around the world. You can buy a matched pair or a matched quad of KT77 valves from us. It is recommended that a set of matched valves are always used to ensure the best sound from your amplifier.

We will always attempt to dispatch to you the very same day whenever possible.

Which guitar amplifiers do the KT77 valves fit?

These superb amplifier valves fit many different guitar amplifiers produced by a variety of different manufacturers. KT77 valves have a very specific sound so please check the exact valves you need for your amplifier by clicking here.

Additional information

Dimensions26 × 21 × 17 cm


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4 X KT77 Matched Valves

KT77 Valve JJ Matched Quad TESTED NEW


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