Help! Trying to pick an amp/preamp for an Acoustat 1+1s

I am picking up a pair of Acoustat 1+1s and need your advise on powering them.

I would like your opinions on these:

Pass Lab 150 IN

Rogers High Fidelity EHC-100 K88

Synthesis Roma 510 AC Int

I am also interested in a VTL 225 but would need another preamplifier.

Thank you in advance,

fortepiano5011-06-2022 1:00am

ghdprentice Details Discussions Posts This discussion Message User 7,841 posts 11-07-2022 at 01:46am Copy Comment URL Report Comment Edit Delete @charles1dad Great. I am just relating my experience. I run all tubes these days… left electrostatics and other planar in the past.
ghdprentice Details Discussions Posts This discussion Message User 7,841 posts 11-06-2022 at 11:58pm Copy Comment URL Report Comment Edit Delete Back when you could buy them new I auditioned a pair of Acoustat 2 + 2, they required massive current. I got bigger amp: they drained the massive 75 pound Yamaha… 150wpc (?) I tried. Drained it dry at relative low volume. I had to return them. I bought the biggest newest Threshold s500 to power them… but it was so expensive I couldn’t afford to buy the Acoustat. Perhaps, someone has more recent experience… but I would look at a Pass 350.