Recommendations on a passive preamp

I have had many passive preamps but none of the ones you are considering.

The best for me have been First Sound Passive and Axiom.

Hope this helps

Fernando

I have been very pleased with my Reference Line 1a passive. The desire for remote control overcame the hesitation at the price. A very well built unit.

I have seen non-remote Reference Line passive go for as little as $400.

I have heard some good things about the Music First pre.

If you can find a Mod Squad Line Drive deluxe on the 'gon it would be worth considering also....

I have the Adcom 750 and I like it. It is a Nelson Pass MOSFET design and is a Stereophile Class A rated pre. Since you have an Adcom already you might get a little since of Synergy using them together. I've seen them here and on Ebay going for 750 used. I don't know how many outs it has though and it does not have a phono stage either. It can be switched to passive mode by flipping a toggle switch. Read the reviews on this piece of equipment.