Mesa Boogie Cryo Pre Amp Kits / Mesa Rectoverb 50 Harma 12AX7WA Vintage Pre Amp Upgrade Kit Cryo

Mesa Rectoverb 50 Harma 12AX7WA Vintage Pre Amp Upgrade Kit Cryo Click on image(s) above to view larger
£112.00
£102.00

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These are specially selected preamp/front end sets for Mesa Boogie owners. The sets consist of specially position selected pre amp valves that have been selected for each position in your Mesa.

We have 4 kits such as Low gain, This to give the maximum clean headroom, Standard gain, to give a warm and fat overdrive and Hi gain to give you maximum over drive with the lowest noise. Our 4 th Kit, called the Vintage provides boogie owners with a valve close in tone to the vintage Mullard ECC83 with the sparkling highs of the American General Electric 12AX7WA. So you can the best set to suit your playing style.

These Cryogenically treated valves are tested and selected to give the best sonic performance out of your Mesa Boogie amplifier.
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This Harma 12AX7WA Vintage cryo preamp upgrade kit is an answer to many players requests for a late break up ECC83/12AX7 type. The late break allows your pre amp to be cleaner which in turn does not drive your output valves as hard allowing you to get that power amp distortion more naturally resulting in more of your amps tone. Ideal if you use pedals to overdrive your amplifier as the valve does not go thin and mushy and due to its late break up and nonaggressive manner remains cleaner longer.

The Harma Vintage 12AX7WA Cryo was designed by the factory to combine the two most vital characteristics of the most famous ECC83 types. The famous Mullard fat midband that produces warm and thick mid sound with excellent note the definition. The master stroke is that the Harma 12AX7WA retains the sparkle and chime that is found in the great vintage American General Electric 12AX7WA. It has the GE style large soundstage and gives the clean channel that chiming top end sparkle without being brittle or hard.

This is a specially cryogenically treated version offers improvements in top end detail giving better transparency and definition over the standard version. The mid band sees improvements in detail and warmth and the bass response become sharper and more musical. The other factor that guitarists find the major reason for choosing this valve is that it has more bite and has a smoother more harmonic distortion with later breakup.

The kit consists of 5 valves.

4 Specially Selected Harma 12AX7WA Vintage Cryo
1 Specially Selected & Balanced Harma 12AX7WA Vintage Cryo for V5

Please note that this kit is for the valves only

All Harma preamp valves are Dynamically Drive tested under real working condition have passed the following tests:

Gain (db) Drive Tested
Transconductance (gm) Drive Tested
Output Drive Tested
Noise 1 (signal to noise)
Noise 2 (Aural)
Microphonics Test 1(Ambient)
Microphonic Test 2 (Shock)
Cathode Test
Grid Leakage Test

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