Fast & open sounding amp with great imaging 2k

Ebm, used Pass 250.5 for $2K?

Based on your listening preferences and desire to use a high-impedance speaker, you're a perfect candidate for an OTL amp.

There's an Atmasphere M-60 classified on Audiogon right now at just under the $2K mark that might be a consideration. (I have no affiliation with the seller.)

Michael

Zuio-

I concur w/ the above. Add Classe' and Pass Labs to your list. I would be remiss if I did not suggest an audition with both of these wonderful power amps!

Keep me posted & Happy Listening!

10-24-15: Zuio
one more thing, my speakers sound best with higher than usual output impedance (my amp has variable output impedance and the best setting is 14Ohm)

If that's the case, then the Classe CA-2200 is not for you, as it has a very low output impedance figure of 0.0055 ohms @50Hz. Good luck with your search!

... and impedance minimum of my speaker is 6.5 Ohm

Thank you,

one more thing, my speakers sound best with higher than usual output impedance (my amp has variable output impedance and the best setting is 14Ohm).

My single driver speakers lack in the treble department and need more treble energy and a more open soundstage. I am open to cable recommendations as well.

I value timing (micro dynamics), imaging (presence) and openness (soundstage) the most.

There is a classic pair of VTL TT-25 Tiny Triodes for 875 which is a great price. You could even re-tube with NOS tubes from Andy at VintageTubeServices and be near your 2K budget. Also there is a pair of Music Metre silver interconnects (retail 400) that will do what you are looking for at 198 and you get a pair of Signature coppers for free.

The Unison looks interesting.

I always liked the Classe CA-2200 which has plenty of power and headroom, is quiet, smooth, resolving & certainly fast. I know the CA-2200 was a great match with Infinity Renaissance 90's. This is a well reviewed amp & you can pick them up in good shape circa $2200-$2500. Btw the Classe pairs well with tube preamps due to it's neutrality and high input impedance (100kΩ).

Used pass 250.5.