Marshall Amp Cryo Full Revalve Kits / Marshall JCM 800 Series 2205/4210 50 watt Classic EL34 Retro Cryo full upgrade kit
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Marshall amplifiers are voice of Rock and Roll past, present and in future.These amplifiers have been used by all the music legends. From Clapton's fierce bluesbreaker solos with John Mayall, to the powerhouse slam of Jimmy Page in Led Zeppelin to Steve Jones awesome sound with his JCM800. These Kits are designed and put together to enable you to get the best out of your particular amplifier.The Marshall J.C.M 800 Series 2205/4210 Classic EL34 Retro full revalve kit is specially selected for Marshall J.C.M 800 Series split channel reverb 2205, 4210 & 4212 50 watt head & combos. The Classic Marshall kits are designed to give your Marshall as close to the old Mullard tone as possible. This is done by using modern day production valves that are traditionally voiced and then getting the sonic improvement that Cryogenic treatment brings to the valve. The cryo treated valves have a smoother distortion with more detail and clarity. The valve has more bite and better focus and they produce a sound that is only attainable by using very expensive new old stock valves.
In the Pre amp section we use the following,
The ECC83 Retro Cryo retains the classic Marshall crunch and provides a harmonically rich and detailed sound with excellent 3 dimension midrange response. This valve has a traditional British voiced sound and the Cryo treatment improves this valves sonic signature and gives exceptional depth in the midrange. The cryo treatment enhances the smooth linear midrange response and gives extended frequency response so you get smooth warm and punchy midrange with excellent clarity and tight fat punchy lows. The Cryo treatment also improves the valves overdriven characteristics providing a warm sustaining sound with plenty of upper harmonics. This captures that classic vintage Marshall sound better than all the other ECC83/12AX7 that I have tried.
In the output stage
The Harma EL34-Retro Cryo is based on the famous Mullard EL34 XF2 design and has a number of important features over standard EL34 types. The grids of the tube use a block construction this enables the valve to provide smoother output and eliminating odd order harmonics. The result is a tight bass response with a balanced sound stage and clean clear treble. Thicker glass not only adds strength but also provides lower microphonics.
This valve is then Cryo treated which gives the following improvements over the standard untreated item. The valve now has a richer clear treble response which has more clarity and bite at the top end. The cryo treatment enhances the valves mid forwardness give a full sustaining tone when overdriven which is especially good on solo’s. The bass end is very tight and well focused and crunches with more weight than the standard EL34.
The Harma EL34 Retro Cryo will suit the vast majority of guitarists from the classic rock player, the hard rock and metal player who want that classic Marshall sound. The EL34 Harma Retro Cryo also attained a 5 star review in Guitar Buyer magazine therefore making this the ideal valve for the governors’ amps
The set consists of 7 valves
4 Specially Gain selected Harma ECC83 Retro Cryo in V1 to V4,
1 Specially Gain selected and balanced Harma ECC83 Retro Cryo in V5
2 Selected and matched Harma EL34 Retro Cryo in a matched Pair.
Please note that this is the valves only
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