Buying a Matched Quad of KT88 Power Valves.

4 x KT88 matched power valves. Are you looking to buy a matched quad of KT88 power valves? Great – you’ve found the best.

We sell the awesome JJ KT88 power valve/power tube. 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 in a different box.

• All of our power valves are carefully chosen, fully tested, digitally matched and graded before we ship to you.
• These Selected Premium Grade JJ valves deliver superior tone, power and performance.
• We offer a range of fast delivery options with full tracking and insurance.
• We have 30 years in the business so you can order with total confidence.
• Global shipping – we ship all over the world.

Why do these KT88 power valves need to be matched?

In a guitar amplifier with two output valves, one valve is “pushing” the speaker cone while one is “pulling” it. So, in an amp with four output valves, the same applies but the amp has twice the power.

With the same signal applied to each valve, it’s important that each valve gives an identical amount of push or pull. If this was not the case, sound fidelity and tone would be lost.

So you MUST replace both output tubes at the same time. At AmpValves we carefully select, test and digitally match all stock before we ship to you.

A matched quad of KT88 power tubes means all four tubes give the same bias current under identical conditions of plate voltage and grid bias voltage. Please note that valves (even the same make and same model) can differ significantly in their characteristics. So this is why matching the valves is so important.

Matched Quad of JJ KT88 Power Valves/Power Tubes

The KT88 valve is a much sought after guitar amplifier valve.

It is highly regarded by guitarists around the world. The only reason that more amplifier manufacturers don’t use them is to keep down the costs, which is a real shame.

You can buy a new and tested matched quad of KT88 valves from us. We also sell KT88 matched pairs if you just need two of them

So we recommend that a set of matched valves are always used. This will ensure the best possible tone and power from your amplifier.

Which guitar amplifiers do the KT88 valves fit?

These superb amplifier valves fit many different guitar amplifiers produced by a variety of different manufacturers. KT88 valves have a very specific sound so please check the exact valves you need for your particular amplifier by clicking here .

These valves are also used in a wide range of valve powered hi-fi equipment.