Ampeg Full Revalve Kits / Ampeg SVT 2 Pro Harma 7025 6550A Retro Full Upgrade Kit

Ampeg SVT 2 Pro Harma 7025 6550A Retro Full Upgrade Kit Ampeg SVT 2 Pro Harma 7025 6550A Retro Full Upgrade Kit Click on image(s) above to view larger

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These Ampeg full revalve kits are put together to provide a sonic upgrade to your Ampeg. I own and have played over the past 30 years Ampeg SVT, Original V4B and for recording used the B15-N portaflex.These amps are still the kings of bass amplifier in my opinion and these kits use the best of New Old Stock valves and modern day production items to give you the best sound out of these lengendary bass amps.
Ampeg SVT 2 Pro Harma 7025 STR Full upgrade kit is designed to give your SVT 2 Pro a clean sound but when run with a fair amount of input gain will give a little valve distortion that will recreate the edge of the original all valve vintage SVT.

This set will suit the player who wants to get more of a vintage throaty ampeg valve sound.

The Harma 7025 STR DR 250 is a high gain valve selected for bass amps and it will not distort as soon or sound as fizzy as the standard Chinese 12AX7-C. The Harma 7025 therefore offers better performance with this regard. The valve is very well balanced with nice even bass which has plenty of depth with the top end being more aggressive and hard.

The Harma ECC82 STR follows the frame grid style of plate construction which makes it super low in microphonics. The sound is extremely well balanced and transparent. This valve also has less midrange emphasis than the Harma ECC822 Retro allowing you to dial in the amount of fatness that you want. It supplies a clear and deep bass response with a fast attack which makes it ideal for those percussive styles of playing

The Harma 6550A has a rich warm transparent sound and supreme reliability.
The valve has a number of important features .It uses special thick mica with internal bracing and spacing supports with full length anode heat wings to aid cooling capacity and provides improved heat transfer. The plate is constructed out of high temperature laminated alloy with an industrial grade glass envelope to prevent microphoney. The control grid wire is made of gold with a special coated screen grid to improve reliability.

This is certainly the best sounding 6550 that I have found in the Ampeg SVT in both original and PCB units in over many years of use.

The valve when used in conjunction with the extensive tonal shaping of the SVT 2 pro can be used to get the full range of vintage sounds, Precision bass type clank with a more aggressive top end sound.

The kit consist of 14 valves

5 Specially selected Harma 7025 STR DR 250
3 Specially selected Harma ECC82 STR
6 Specially selected Harma 6550A Retro in a matched sextet

Please note that this set is for the valves only



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