Tube preamp recommendation for a simaudio 760a amplifier

Hi Folks,

I'm looking for a new tube preamp for my 760a amplifier. My Don Sachs tube pre sends it into dc protection mode. According to Don and my tech, this amp is too sensitive for this preamp which is capacitor coupled.It just leaks too much DC at the outputs.  I love the sound but it's just not jiving. I'd probably need a transformer coupled preamp. I like a warm detailed sound. 

Thanks in advance!


Replacing your excellent Sachs pre could be tough, but the easiest recommendation if it’s in your price range would be the new Spatial Audio Raven preamp that Don was heavily involved in designing. Another that I think is worth a good look is the Aric Audio Motherload II or XL. Hope this helps, and best of luck.

I cannot recommend anything, however 6sn7 tube was mentioned.

my Cayin integrated uses both 6sn7 and 6sl7.

I always had 12....... before, didn’t even know these 6 .....existed.

It/they sound terrific, so much so than a few of my friends, after listening here (and researching) only considered preamps with 6...

Tube Rolling: after you get a compatible tube preamp, I suggest buying replacement/alternate tubes from a source allowing returns. I blew up a 6.... (my fault), tried a new matched pair, hated them. Brent Jesse had me break them in for 60 hours (simply on, no source needed), and let me return/replace them with a different choice. My second choice (half the price) sound terrific, he gave me a refund for the difference in price, I just paid the shipping involved.

I always say, it’s ’preferred’, not ’better’.


I have two friends who use Audio research tube preamps with their Sim moon amps with great results. 

zesto a fuly balanced tube preamp with adjustable gain 


we have a demo unit 

Dave and Troy

Audio intellect nj

formwe zesto dealer