Ampeg Full Revalve Kits / Ampeg SVT CL Harma-STR JJ 6550 full revalve kit

ampeg SVTCL 300w Bass Head Click on image(s) above to view larger

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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.
The Ampeg SVT Classic reissue head fitted with our Harma-STR pre amp kit is designed to give your SVT Classic head reissue 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 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 treble has nice punch which can sound clanky if required when used in conjunction with the Classics pre amp circuit. The kit has a more balanced sound and can be used to get the full range of vintage ampeg sounds right through to a modern clean sound.

The Philips Jan Military Specification ECC82/5814A was made with the highest grade materials and with no compromise on selection or quality control as they were made for the American Government. These valves have a number of unique features such as high grade filament isolation, so even after long periods of use the filament will not degrade. Immune to shock and vibration and rated for long life. The 5814A has a very clear bass response, which is both tight and musical. The sound is well balanced and good even detail across the audio spectrum with a clear and smooth treble. The sound and build quality is not equaled by any modern day valve. That is why it is used in this kit

In the output stage we selected and match a sextet of JJ 6550.

The JJ 6550 provides very lively punchy performance with a silky smooth midrange.
The classic ampeg growl was not as pronounced as with the GE, Svetlana or The Harma 6550. 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 clear top end detail 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 11 valves

3 Specially selected Harma ECC83-STR
2 Specially selected Philips JAN ECC82/5814A
6 Specially selected JJ 6550 in a matched sextet

Please note that this is for the valves only



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