Best Used Tube Preamp (under $750)?

I've been on "search" myself. I heard good things about all of the pre-amps you mentioned, plus, "Audible illusions" "Anthem pre-1" and couple of others...! However, the funds are "tight" so i had to be "inventive". I found the DIY (kit)or assembled pre-amp based on famous Marantz 7. You can find more info. from "Parts Express" and Valve Audio Laboratory. The model is MP-L1S MKII. Good luck!

Conrad Johnson PV10A. I love mine.

I love my Rogue66. Another good choice would be Sonic Frontiers SFL1 -Signature. Should be within your price range. Good Luck

The VAL MP-L1S, has beed discontinued! However, you can get the schematics for the same. But, with so many good used Pre-amps on sale, why bother? The choice is made and based your source, and the amp AND the speakers you have. Most people should build their "system" around Pre-amp. Not "vice-versa". The pre-amp is THE most important "piece" in one's "system", and you should spend the most of your money on, or to say at least, same as your amp! Rergards!

I would have to agree with Rgd on the Sonic Frontiers SFL-1 or SFL-1 Signature. After owning one of these gems and putting a good tube in it they are very hard to beat for the money. I have to admit that it had an amazing soundsatge , good depth , and very very nice tonal balance. For the used price in $550.00 to $700.00 range this is, as it was called back in it's day "A Giant Killer". Excellent bass signal and very natural highs when matched to the right amp. You can buy it and re-sell it for the same money if you don't like it. They stay at the same price and are always looked for by others......Good Luck !