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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”.
- NameBrandCommentStockPrice PhotoOrder
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This 6 valve set of specially selected standard gain Cryo ...In stock£134.00
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Standard Gain Cryo
This 7 valve set of specially selected standard gain Cryo ...In stock£156.00Buy Now - ECC83/ ECC83WA-TAD RT008 CRYOTube Amp Doctor Cryo The TAD ECC83 WA is aimed at the Fender market as it provides a clear high end response. TAD has made this valve as an ...In stock£26.00
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This is the German made ECF80/6BL8 which is ...In stock£35.00
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Specially selected and cryogenically treated premium quality Marshall EL34B valves that have all ...In stock£34.00
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Buy Now - EZ81/ 6CA4-HARMA RETRO CRYOHarma Cryo The Harma EZ81 Retro is based on the European design used by Mullard and Philips in the 1960s for military ...In stock£30.00
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JJ EZ81 design is based on the original Czech Tesla EZ81 from the mid 1970 ...In stock£26.00
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The JJ GZ34 design is based on the early Mullard GZ34 that has the lager plate ...In stock£30.00
Buy Now - GZ34/ 5AR4-HARMA RETRO CRYOHarma Cryo This is a special cryogenically treated version that offers the highest performance.The Harma GZ34 Retro Cryo design is ...In stock£48.00
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Original Winged C Svetlana
These are the ORIGINAL Svetlana KT88 as made by JSC ...In stock£175.00
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