Ampeg Pre Amp Kits / Ampeg SVT 2 Pro Harma STR Preamp Upgrade Kit

Ampeg SVT 2 Pro Harma STR Preamp Upgrade Kit Ampeg SVT 2 Pro Harma STR Preamp 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.

These Ampeg pre amp revalve kits are put together to provide a sonic upgrade over the stock valves in your Ampeg. I own and have played over the past 30 years Ampeg SVT, Original V4B and for recording the B15-N portaflex. I have also used many of the Ampeg valve pre amps.So 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 STR Pre amp kit is designed to give your SVT 2 Pro a clean sound 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 and musical styles.

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 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 Harma ECC82 STR 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 Harma STR set is best suited to bass player that wants a cleaner punchier sound. This set gives the most neutral and balanced sound and therefore gives the player the greatest versatility to shape the Ampegs tone.

The kit consists of 8 valves

5 Specially selected Harma ECC83 STR
3 Specially selected Harma ECC82 STR

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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