Ampeg Full Revalve Kits / Ampeg SVT 2 Pro Harma STR 6550 JJ Full Upgrade Kit

Ampeg SVT 2 Pro Harma STR 6550 JJ Full Upgrade Kit Ampeg SVT 2 Pro Harma STR 6550 JJ Full Upgrade Kit Click on image(s) above to view larger

All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.

A test report is available click here to view

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.

Special Offer 10% Discount

The Harma STR JJ upgrade kit is designed to give your SVT 2 Pro a clean sound but without enhancing any particular frequency. This set will suit the player who wants to get a nice clean and well balanced sound and this will suit the majority of Ampeg owners.

The Harma ECC83 STR is a very well balanced with nice even bass response which has plenty of depth. The mid-range is very transparent which when changing pickup selection or using different basses gives a nice tonal variation that was lost in some other valves.

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 treble has nice punch which can sound clanky if required when used in conjunction with the extensive tonal shaping of the SVT 2 pro.

The JJ 6550 provides very lively punchy performance with a silky smooth midrange.
The low end bass response is very tight with plenty of depth and detail.

The JJ 6550 is superbly balanced with the mids sitting in the correct position and providing plenty of detail. Top end is clear without being harsh

This valve is best suited to bass player that wants a cleaner and leaner sound or wants more versatility to shape the Ampegs tone

The kit consists of

5 Specially selected Harma ECC83 STR
3 Specially Selected Harma ECC82 STR
6 Specially selected JJ 6550 in a matched sextet

Please note that this set is for the valves only



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