Ampeg Pre Amp Kits / Ampeg B15S Harma ECC83 STR Preamp Kit

Ampeg B15S Harma ECC83 STR Preamp Kit Ampeg B15S Harma ECC83 STR Preamp 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.
The Ampeg B15S preamp revalve kit will cover the B15S which was a high powered porta flex amplifiers that was made from 1971 to 1977. 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.

We use specially selected Harma STR 12DW7 and ECC82 which have been chosen for their very clear bass response and tight low end. The sound is well balanced and good even detail across the audio spectrum with a clear and smooth treble.

The set consist of

2 Specially selected Harma ECC83 STR
1 Specially selected Harma 12DW7 STR
1 Specially selected & Balanced 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)



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