Products > Cryo Valves

Cryo Valves

Watford Valves was the first Company in the World to offer a cryogenically treated valve brand range showing huge commitment to the proven scientific cryogenic process.
The Harma Diamond deep cryogenically treated valve range offers the musician and audiophile valves which are not only specially selected and tested, but are cryogenically treated for the ultimate performance. We also offer a full range of cryogenically treated valves made by the great factories of the past, such as Mullard, Telefunken, Philips as well as modern brands such as Groove Tubes, Tube Amp Doctor, JJ Electronic (formally Tesla), Electro Harmonix and Sovtek. So whatever is your preferred make Watford Valves will have a cryogenically treated version in stock.

What are the benefits of using cryogenically treated Valves?
The cryogenic process offers permanent change to the metals microstructure. The reduction in electronic noise improves the valves noise floor leading to lower microphonics. Until now clear note definition, musical complexity and rich harmonic content was only attainable by using rare and expensive new old stock classics.

Many guitarists have found the dramatic effect cryogenic treatment has on the way the valve performs not only in clean applications but also when overdriven. The cryogenic process removes the harshness from the valves tone and imaging has more focus and bite. It has a warmer sound which is pleasing to listen to, providing a clear and musical distortion. In short, many musicians, engineers and audiophiles have found that by using cryogenically treated valves it is a proven way of obtaining NOS sound quality with a great difference, an affordable price!

We offer a full range of cryogenically treated valves Harma Diamond Cryogenically treated valve range- High quality at an affordable price.

Nick Guppy, amp reviewer for the UK GUITARIST magazine wrote
“Compared to NOS Telefunken, the Harma Cryo ECC83 offered an improvement in gain and high frequency response that noticeably enhanced this amps singing lead voice and lush clean sounds”.

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  • NameBrandCommentStockPrice PhotoOrder
  • 5881-HARMA CRYOHarma Cryo The Harma 5881 Cryo is the button based Russian military valve is the same valve which powered the Marshall and Mesa ...In stock£36.00Buy Now
  • 5881-HARMA CRYO MESA BOOGIE 400 PLUS SETHarma Cryo Special Offer

    Here is a special Cryo set for all you owners of the Mesa Boogie 400 plus bass head who want ...
    In stock£432.00
    Buy Now
  • 5881-HARMA MESA SELECT CRYOHarma Cryo Mesa Select for use in Mesa Boogies

    The Harma 5881 Cryo is the button based Russian military valve is the same ...
    In stock£36.00Buy Now
  • 6111WA-PHILIPS CRYOPhilips ECG JAN CRYOOriginal USA made Philips Jan specification 6111WA Military grade super miniature valve that is the highest quality ...In stock£30.00Buy Now
  • 6CG7/ 6FQ7-GENERAL ELECTRIC CRYOGeneral Electric Cryo GE 6CG7/6FQ7 has the classic GE sound stage which is big and open. These are original USA made valves are specially ...In stock£30.00Buy Now
  • 6GK5/ 6FQ5-HARMA CRYOHarma Cryo These specially treated cryo 6GK5 offer the Conrad Johnson owners the ultimate performance. They provide a more ...In stock£20.00Buy Now
  • 6L6GC-HARMA RETRO CRYOHarma Cryo The Harma 6L6GC Retro is a re issue of the famous Sylvania STR 387 that was produced for Fender in the early 1970s.This ...In stock£40.00Buy Now
  • 6L6GC-HARMA RETRO CRYO MESA SELECTHarma Cryo Mesa Select for use in Mesa Boogies

    The Harma 6L6GC Retro Cryo Mesa Select is a re issue of the famous Sylvania ...
    In stock£44.00Buy Now
  • 6L6GC-SVETLANA WINGED C MESA SELECT CRYOSvetlana Winged C Cryo Mesa Select for use in Mesa Boogies

    This valve is specially selected to run in Mesa Boogies fixed bias ...
    Sold Out£75.00Buy Now
  • 6N1P-VI-HARMA CRYOHarma Cryo The Harma 6N1P VI Cryo is a special long life, low noise version of the 6N1P. They are all selected to very tight ...In stock£24.00Buy Now
  • 6V6GT STR-TAD CRYOTube Amp Doctor Cryo The TAD 6V6GT STR Cryo is a special Cryo treated version of the TAD 6V6GT STR.TAD have based this 6V6GT design on the ...In stock£36.00Buy Now
  • ECC81-HARMA STR CRYOHarma Cryo The Harma ECC81 CRYO is a specially treated and selected valve for use in critical positions in both audio and guitar ...In stock£26.00Buy Now
  • ECC83-HARMA RETRO CRYOHarma Cryo The Harma ECC83 Retro Cryo is a true sounding recreation of the famous Mullard ECC83.The valve produces a harmonically ...In stock£30.00Buy Now
  • ECC83-HARMA RETRO-BALANCED CRYOHarma Cryo The Harma ECC83 Retro balanced Cryo is a true sounding recreation of the famous Mullard ECC83.This is a special Cryo ...In stock£36.00Buy Now
  • ECC83-HARMA STR CRYOHarma Cryo The Harma ECC83 STR Cryo has the most neutral and warmest sounding with the Classic vintage tone when compared to all ...In stock£26.00Buy Now
  • ECC83-HARMA STR CRYO BALANCEDHarma Cryo Special balanced item with matched sections for use in phase inverter position, tube microphones or input positions ...In stock£30.00Buy Now
  • ECC83/ 7025-HARMA DR250 CRYOHarma Cryo The Harma 7025 Dr250 High Gain Cryo is the perfect valve where clarity and gain are the main requirements. This valve ...In stock£30.00Buy Now
  • ECC83/ 7025WA-TAD RT080-CRYOTube Amp Doctor Cryo The TAD 7025 WA Cryo is a low noise version of the TAD ECC83 WA selected for use in demanding V1 position of high gain ...In stock£30.00Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYOJJ Tesla Cryo This specially treated cryogenic version of the JJ ECC83S.The Cryo treatment gives better clarity, improved Sonics and ...In stock£26.00Buy Now
  • ECC83/ ECC83WA-TAD RT008-CRYOTube Amp Doctor Cryo TAD ECC83 WA is a valve from TAD which is aimed at the Fender market and provides a clear high end response. TAD has ...In stock£26.00Buy Now
  • EF86-DARIO PHILIPS CRYOPhilips CryoEF86 Cryo Dario Miniwatt The Dario Miniwatt was a brand name for mighty Philips electronics group. Phillips were the ...In stock£50.00Buy Now
  • EF86-TESLA CRYOTesla CryoOriginal Tesla EF86 that has been specially selected for low noise and cryo treated for use in high end applications ...In stock£65.00Buy Now
  • EL34/ EL34B STR-TAD CRYOTube Amp Doctor Cryo The TAD EL34B STR CRYO is a specially cryogenically treated version of TAD EL34B STR. The TAD EL34B has been around for ...In stock£40.00Buy Now
  • EL34/ EL34B-MARSHALL CRYO Marshall Cryo ValvesSpecial Offer

    Specially selected and cryogenically treated premium quality Marshall EL34B valves that have all ...
    In stock£34.00
    Buy Now
  • EL34/ EL34M-GROOVE TUBES SUPER PREMIUM CRYOGroove Tubes CryoGroove Tubes Super Premium Cryo valves are specially burst tested by us. We take selected GT items and in addition to ...Sold Out£40.00Buy Now
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