Mesa Boogie Cryo Full Revalve Kits / Mesa Buster Bass 6L6GC Harma Retro Cryo Classic Full Revalve Kit

Mesa Buster Bass 6L6GC Harma Retro Cryo Classic Full Revalve Kit Click on image(s) above to view larger
£230.00
£207.00

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Our Mesa Boogie specially selected Cryo full revalve kits are designed to enable you to get the best sound out of your Mesa Boogie amplifier. These sets consist of specially position selected Cryo treated pre amp valves that have been selected for each position of your Mesa amplifier. In the output stage we use specially cryogenically treated valves that have been selected to work with the Mesa boogies fixed bias arrangement. Certain output valves will be better for certain kinds of music and therefore to make your choice easier we have indicated this in our product description. Mesa Boogie amps have pioneered the way in multi channel high gain amplifiers and with these cryogenically treated valves sets this will take your sound to a new level.
10% Discount


This full Cryo revalve kit consists of specially selected Harma Retro Cryo valves for the Mesa Boogie Buster bass combos. This set has been designed to give your Mesa more top end transparency and the classic warm tone which many bass players require out of their Mesa amplifier.

The pre amplifier valves are specially selected for Mesa amplifiers for low microphonics and gain and the kit includes a balanced valve for the phase inverter position.

The output valves have been specially burst tested as all Harma output valves are under real working conditions to ensure the utmost reliability. The output valves have also been specially selected to run with Mesas non- adjustable fixed bias arrangement.

The Harma ECC83 Retro pre amp valve offer more harmonic warmth with more transparency in the midrange than 12AX7 Russian 2 or the Harma ECC83 STR. The outstanding feature of the Harma ECC83 Retro is its smooth linear midrange response and clarity. So you get a smooth warm sound with tight fat punchy lows. This has become our most popular pre amp valve for Mesa amplifiers.

The Harma 6L6GC Retro is a re issue of the famous Sylvania STR 387. It features the same anode plate design with internal bracing and has extra thick mica spacers with steel spacers which reduces vibrations, rattle and microphonics which is a problem with many modern valve bass combos using 6L6GC.
Sound wise, the Harma 6L6GC Retro provides a clear extended treble response and has clean rounded mid-range response. The valve offers better bass extension and a far more solid sound when compared to the stock valves. The combination of bass extension and clarity makes it our choice for use in Mesa bass amplifiers

The full upgrade kit consists of 9 valves

2 Specially Selected Harma ECC83 Retro Cryo
1 Specially Selected and Balanced Harma ECC83 Retro Cryo
6 Specially Selected Harma 6L6GC Retro Cryo in a matched sextet.

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