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valves for Marshall JCM800 SC20H amplifiers.

Marshall JCM800 SC20H

Best valves for Marshall JCM800 SC20H amplifiers

The Marshall JCM800 SC20H amplifier uses:

  • 2 x ECC83 preamp valves (also called 12AX7).
  • 1 x Balanced ECC83 for the phase inverter (in position V3).
  • 2 x EL34 matched power valves/power tubes.

A brand new set of valves will get your amp sounding better than ever. This ampifier is cathode-biased so no bias adjustment is needed when you replace your valves – just plug and play.

Order your valves below and hear the difference.

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

  • All of our valve kits are carefully selected, fully tested, digitally balanced and matched.
  • We offer a variety of shipping options with full tracking and insurance so you can order with confidence.
  • We have 30 years of experience so you know you are in safe hands.
  • International shipping – we post all over the world every single day.

Replace the valves on your Marshall JCM800 SC20H amplifier

If you have any queries about replacing your valves please get in touch. We have over 30 years of experience so one of our team will always be happy to help and advise.

Also, we recommend that you take a look at our FAQ section where we answer the most popular questions we get asked each week. You will also find lots of useful tips if you are new to upgrading your tubes.

If you want to know what your shipping options are, simply add the product to the basket and when you get to the check out it will show you delivery costs, options and delivery times.

About the amp.

Marshall builds the SC20H in the exact same factory as the renowned full-size JCM800 amps that have achieved such an enviable reputation.

These superb amplifiers give you all the JCM800 roar without disturbing the neighbours. This 20W head embraces the sound of the JCM800 range at a much smaller size. It is ideal for the studio or the bedroom with the power reduction option set to 5W. It is cathode-biased baised so no bias adjustment is required when you change your tubes.

Marshall recommends that you pair the SC20H with one of their Studio size cabinets for a small but perfectly formed Marshall rig.

Tubes for sale for Marshall JCM800 SC20H amps

Order yours today and get your amp sounding better than ever.

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

Replacement Valve Kit for Marshall JCM800 SC20H (1 x ECC83 2 x Balanced ECC83 2 x Matched EL34)

£129.74
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EL34 Valves (Tubes) Marshall EL34 Matched Pair NEW TESTED (2 x EL34)

£71.23
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Why buy your new valves from Ampvalves?
all valves tested and digitally matched
  • Amazing Quality - All our valves have been tested to the highest possible standard using the best testing equipment on the market.
  • 100% Guarantee - All of our valves are fully guaranteed for complete peace of mind.
  • Soak Testing - All of our valves are soak-tested for 30 minutes to reduce failures after fitting.
  • Rated 5 Stars on Trustpilot
  • Awesome Tone - You'll hear the difference. A new set of tubes will get your amp sounding and performing like new.
  • Stunning Price - Our individual Valves and complete Amp Kits are competitively priced to ensure you get great value.
  • Superb Customer Service - We are always at the end of the phone to answer any questions you may have. We are all guitarists here and treat every customer as we would like to be treated.
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