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
  • 6L6GC G.E GROOVE TUBES RE ISSUE SUPER PREMIUM CRYOGroove Tubes CryoThese is no doubt that after having the benefit of comparing virtually every major 6L6GC that has been made that the GT ...In stock£35.00Buy Now
Total : 51 | Page 3 of 3
All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by all EU countries.


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