Products > 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”.
- NameManufacturerCommentStockPrice PhotoOrder
- ECC82/ 5814A-PHILIPS CRYOPhilips ECG JAN CRYOSpecially Cryo treated ECC82/5814A Philips using a proven method of Audio treatment so you will get the benefits of ...In stock£25.00Buy Now
- 5703WB/ RAYTHEON CRYORaytheon CryoOriginal USA made 5703 WB Raytheon Cryo is an instant upgrade over the standard 5703. The Cryo Treatment further ...In stock£25.00Buy Now
- 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£20.00Buy 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£22.00Buy Now
- 5U4GB-HARMA RETRO CRYOHarma Cryo The Harma Retro Cryo 5U4GB is a specially Cryogenically treated version offering the ultimate in performance.The Harma ...In stock£20.00Buy Now
- 5Y3WGTA-PHILIPS CRYOPhilips ECG JAN CRYOThese are the Original American made Jan specification Cryo Philips 5Y3WGTA with the rare black plate box anode ...In stock£28.00Buy 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£20.00Buy Now
- 6550A-HARMA RETRO CRYOHarma Cryo The Harma 6550A Retro Cryo is a meticulous recreation of the classic General Electric 6550A as the Original American ...In stock£36.00Buy Now
- 6550C-SVETLANA WINGED C CRYOSvetlana Winged C Cryo Original Svetlana 6550C winged C which is regarded as one of the best 6550 available today. These are the ORIGINAL ...Sold Out£100.00Buy Now
- 6922/ E88CC-HARMA CRYOHarma Cryo The Harma 6922 Cryo treated is a special quality valve that is the best sounding military Russian 6922 type that was ...In stock£50.00Buy Now
- 6AU6WC-GENERAL ELECTRIC CRYOGeneral Electric Cryo The 6AU6WC General Electric in Cryo treated format has been introduced for customers who have requested this item for ...In stock£16.00Buy Now
- 6C45PI/ SOVTEK-CRYOSovtek CryoThe Super Russian 6C45PI is an audio super valve that has excellent sound characteristics. This Sovtek item is the ...In stock£28.00Buy Now
- 6CG7/ 6FQ7-GENERAL ELECTRIC CRYOGeneral Electric Cryo The GE 6CG7/6FQ7 has the classic G.E sound stage which is big and open. These are original USA made valves are ...In stock£20.00Buy 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£
- 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£22.00Buy 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£24.00Buy Now
- 6L6GC-HARMA STR-CRYOHarma Cryo The Harma 6L6GC STR-CRYO has a number of features that make this ideal in all audio and guitar amplifier applications. ...In stock£22.00Buy Now
- 6L6GC-STR-TAD CRYOTube Amp Doctor Cryo The Cryo T.A.D 6L6GC-STR is an excellent valve and in sonic terms out performs the standard untreated item by a long ...In stock£25.00Buy Now
- 6L6GC-SVETLANA WINGED C CRYOSvetlana Winged C Cryo The Svetlana 6L6GC was designed based on the famous Sylvania STR 387 6L6GC and manufactured in the JSC Svetlana factory ...In stock£40.00Buy 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 ...In stock£42.00Buy Now
- 6L6GC/ JJ-TESLA -CRYOJJ Tesla Cryo The JJ-Tesla 6L6GC Cryo is the best sounding version of JJ 6L6GC valve available today. The Cryo treatment enhances the ...In stock£20.00Buy Now
- 6L6WGB/ 5881-PHILIPS CRYOPhilips ECG JAN CRYOThese are the Cryo treated version of the original small bottle American Military JAN 6L6WGB/5881 that was made for the ...In stock£38.00Buy Now
- 6L6WGC-STR BLACK PLATE TAD CRYOTube Amp Doctor Cryo The TAD 6L6WGC-STR Cryo is one of my favourite valves as the cryo treatment really takes this valves performance to ...In stock£26.00Buy Now
- 6N1P-SVETLANA-CRYOSvetlana Winged C Cryo Only 4 left
This is a special Cryo version for high end audio.The Svetlana 6N1P is the long life EB version ...In stock£16.00Buy 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£15.00Buy Now