Aesthetix Calypso compatible with Pass amps?

I had tryd the Calypso with my Pass 250.5 it was a nice match. But a little to layed back for me & The upper end was a little (and I mean a little)on the dark side. Bass was real good not to fat & real tunefull. Midrange was open & transparent really really good. My speakers are Totom Forest. Hope this helps you.

Rhythmace4218, e-mail Pass with all the specs for your preamp and asked them if there may be any issues. They're pretty good responding to e-mails.
Calypso has 29db output gain, which may be pretty high for the Pass amp. I have adjustable gain on my preamp with 600ohms out-impedance just like the Calypso and when I set the gain to 24db in balanced mode, the amp is getting driven too hard I think. I end up using either 12db or 18db output gain, depending on what I'm listening to.
But I never use the high-gain setting.

But as I said, you better ask the people who build the amps.

I've used this very combination, and there is no impedance mismatch if run in balanced. I totally disagree with Ben954. The Calypso is not dark in any respect at all. If anything, it can be a bit brightly lit in the top end with this amp. The Pass 250.5 is hardly laid back in the high end either. It is a decent match, though I would not recommend this combinaton with metal tweeters, only soft domes.

I am really trying to get a feel for the sound of these pre-amps. I was just corresponding with some one who owns the Grange model and sellng because he says 'microphonics are driving him brain crazy"

This pre is for a second system for me, not my main but I want to be able to get the best out of it.

I am looking at the Sauvigon or Cabernet in line stage only.

Thoughts would be appreciated.

Thank you all for your input. It has been very helpful.
Dev, did you read the title of this post?