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”.

Order By
Total : 51 | Page 2 of 3
  • NameBrandCommentStockPrice PhotoOrder
  • ECC83/ ECC83S-JJ TESLA CRYO HIGH GAIN 3 VALVE PRE AMP KITJJ Tesla Cryo ECC83-S JJ HIGH GAIN CRYO-3 Valve Preamp kit

    This 3 valve set of specially selected high gain Cryo treated ...
    In stock£60.00
    £54.00
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO HIGH GAIN 4 VALVE PRE AMP KITJJ Tesla Cryo ECC83-S JJ HIGH GAIN CRYO 4 Valve Preamp kit

    This 4 valve set of specially selected high gain Cryo treated ...
    In stock£80.00
    £72.00
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO HIGH GAIN 5 VALVE PRE AMP KITJJ Tesla Cryo ECC83-S JJ HIGH GAIN CRYO-5 Valve Preamp kit

    This 5 valve set of specially selected high gain Cryo treated ...
    In stock£100.00
    £90.00
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO HIGH GAIN 6 VALVE PRE AMP KITJJ Tesla Cryo ECC83-S JJ HIGH GAIN CRYO 6 Valve Preamp kit

    This 6 valve set of specially selected high gain Cryo treated ...
    In stock£120.00
    £108.00
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO HIGH GAIN 7 VALVE PRE AMP KITJJ Tesla Cryo ECC83-S JJ HIGH GAIN CRYO-7 Valve Preamp kit

    This 7 valve set of specially selected high gain Cryo treated ...
    In stock£140.00
    £126.00
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO STAN GAIN 3 VALVE PRE AMP KITJJ Tesla Cryo JJ STANDARD GAIN CRYO 3 Valve Preamp kit

    This 3 valve set of specially selected standard gain Cryo treated ...
    In stock£52.00
    £46.80
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO STAN GAIN 4 VALVE PRE AMP KITJJ Tesla Cryo JJ STANDARD GAIN CRYO 4 Valve Preamp kit

    This 4 valve set of specially selected standard gain Cryo treated ...
    In stock£68.00
    £61.20
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO STAN GAIN 5 VALVE PRE AMP KITJJ Tesla Cryo JJ STANDARD GAIN CRYO 5 Valve Preamp kit

    This 5 valve set of specially selected standard gain Cryo treated ...
    In stock£84.00
    £75.60
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO STAN GAIN 6 VALVE PRE AMP KITJJ Tesla Cryo JJ STANDARD GAIN CRYO 6 Valve Preamp kit

    This 6 valve set of specially selected standard gain Cryo treated ...
    In stock£100.00
    £90.00
    Buy Now
  • ECC83/ ECC83S-JJ TESLA CRYO STAN GAIN 7 VALVE PRE AMP KITJJ Tesla Cryo JJ STANDARD GAIN CRYO-7 Valve Preamp kit

    This 7 valve set of specially selected standard gain Cryo treated ...
    In stock£116.00
    £104.40
    Buy 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£16.50Buy 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£47.00Buy 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£55.00Buy Now
  • EL34 MK2-JJ TESLA CRYOJJ Tesla Cryo The JJ Tesla EL34 MK 2 Cryo is the best sounding version of JJ EL34 MK 2 available today. The Cryo treatment enhances ...In stock£28.00Buy Now
  • EL34-HARMA RETRO CRYOHarma Cryo The Harma EL34-Retro is based on the famous Mullard EL34 and has a number of important features over standard EL34 ...Sold Out£26.00Buy 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£28.00Buy Now
  • EL34/ EL34B-MARSHALL CRYO Marshall Cryo ValvesSpecially selected and cryogenically treated premium quality Marshall EL34B valves that have all been burnt in and ...In stock£20.00Buy 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 ...In stock£35.00Buy Now
  • EL84-ELECTRO HARMONIX-CRYOElectro Harmonix CryoThis specially treated Cryo version of Electro Harmonix flagship EL84 has given great results in guitar amplifiers as ...In stock£18.00Buy Now
  • EL84-HARMA RETRO CRYOHarma Cryo The Harma EL84 Retro Cryo is a recreation of the famous Mullard EL84 and follows the original design and electrical ...In stock£24.00Buy Now
  • EL84-JJ TESLA CRYOJJ Tesla Cryo The JJ-Tesla EL84 Cryo is the best sounding version of JJ EL84 valve available today.The Cryo treatment enhances the ...In stock£20.00Buy Now
  • EL84/ E84L-HARMA CRYO BURST TESTEDHarma Cryo The Harma E84L Burst Tested on the tester designed for Brian May

    This valve is the specially treated cryogenic ...
    In stock£26.00Buy 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£20.00Buy 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£26.00Buy Now
  • EL84S-GROOVE TUBES SUPER PREMIUM CRYOGroove Tubes Cryo10% Discount

    The Cryo treated Groove Tube EL84 Cryo is the best sounding version of this valve available today ...
    In stock£30.00
    £27.00
    Buy Now
Total : 51 | Page 2 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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