marshall jcm 800 4212

Marshall JCM800 4212

Looking for great sounding valves for Marshall JCM800 4212 amplifier? You’ve come to the right place.

Valves for Marshall JCM800 4212 amplifier.

The Marshall JCM800 4212 amplifier uses;

  • 4 x ECC83 (also known as 12AX7) preamp valves.
  • 1 x Balanced ECC83 for the phase inverter in position V5.
  • 2 x EL34 matched power valves/power tubes.

If you currently have Marshall EL34 valves in your amp and love the sound then stay with them.

Order your valves below and hear the difference.

So restore the power and sparkle to your guitar amplifier. Treat yourself, and your amp, to a brand new set of valves today. 

  • Best valves for Marshall JCM800 4212 amplifiers.
  • These premium quality selected valves deliver superior tone and power.
  • Fast delivery options. Fully tracked and insured so you can order with total confidence.
  • All valve kits are carefully selected, fully tested and digitally balanced and matched.
  • We ship internationally every day.

Replace the Valves for Marshall JCM800 4212 amplifier.

If you have any queries about replacing the valves for Marshall JCM800 4212 please do not hesitate to drop us an email and we will get straight back to you

We have over 30 years of experience and will be happy to advise.

If you haven’t changed your valves before please take a look at our very helpful FAQ section before you contact us. Here you will find the answer to most questions along with some really useful hints and tips.

About the Marshall JCM800 4212 amp:

Marshall amplification is one of those iconic amp companies that is so synonymous with the music world. They have been so easily recognized because of the hard rock guys from the 60s and 70s who really put this company to the forefront.

They have such a great sound, great voicing, and pretty much any style of music. The Marshall JCM800 4212 is a split channel JCM 800. These amplifiers were almost exclusively used throughout the ’80s. It has a great tone and had a fast pick attack that was used by almost every guitarist throughout the decade.


With the Marshall JCM800 4212 you have two channels with a reverb unit and that is about it for features go. The clean and dirty channel is cool for the person who needs multiple channels but it wasn’t necessary back when they made it and it eventually fizzled out.

If you’ve ever played a Marshall JCM 800 amplifier you know pretty much exactly the sound that you’re going to get with the Marshall JCM800 4212. This is a 50W combo that has to split channels with a reverb section. So it has more features than a standard JCM 800 would have.

You basically have your clean and distortion channel with a touch of a reverb unit. This is 50 W of power so the power section of the Marshall JCM800 4212 amplifier is going to be a little saggy and looser than 100W amplifier. Usually, hundred-watt amplifiers have more headroom and they tend to break up in the distortion sound a lot later.

Replace the Valves for Marshall JCM800 4212 amplifier. Order yours today and get your amp sounding like new again.

If you’re looking for great sounding valves for your Marshall amplifier – you’ve come to the right place.

Simply choose the complete replacement valve kit or the seperate valves for your amplifier below: