It's time to move on from this spectacular preamplifier. It is very rare that this amp comes up on the used market because it is a tube roller fantasy. You can put in any combination of tubes to customize the sound to your exact liking. I haven’t had the time to use it much as it was in my second system (bedroom) and I am down-sizing.This is not the stock unit. It's one that has been upgraded by the well-regarded Tom Tutay. Here are the benefits from the upgrade: The gain was reduced allowing you to use a bit more on the volume control. Also power supply was beefed up and the middle tube options were greatly expanded. The middle tube is mainly responsible for the sound produced Additionally:
Electrolytic output coupling caps were replaced with polypropylene caps
Gain reduced to +9db
Distortion, Noise, output impedance reduced by a factor of 4
330u added to high voltage supply
Tube operating points modified for more headroom and dynamics Below is a list of all the tube you can use with this amp after the upgrade: Rectifier............middle position ............. outside gain
***Middle position has Most Impact on Sound***
The combination of tubes that can be used to customize the sound to your liking is almost endless. I will provide a list of over 20 small signal tube types that can be used with this preamp after the upgrade upon request
*** This preamp will include premium tubes as follows. Amperex Premium Quality (PQ) E80cc/6085 tube and German RFT 12au7 and Tung Sol 6x4 Buyer pays shipping and Paypal
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