High Current SS amps with input impedance = 200K

My strategy will be to play it safe and go with a high current SS amp that doubles output into 4 and eve 2 ohms as much as possible and has a higher input impedance, along the lines of those I mention above. That will optimize electronic interfaces both in from pre-amp and out to speakers.

From there, whatever amp used will be in an optimal position to synergize with pre-amp and speakers and deliver its best performance as a result, whatever that may be, I would say.

Tvad,

Any SS Amp recommendations given all this?

Mapman, what's your budget (stretched...) and what's your power requirement?

This is primarily for the OHM 5s which have a somewhat difficult load, are only 87db efficient and the more juice, the merrier.

Power requirement: 250w/ch minimum doubling into 4, high current.

I'd like to stay under $2500 if possible for now.

Also, logistically, I would prefer to stay away from large heavy, hot running monster amps if possible. I know that limits my options....

Without commenting on sound, which is a subjective thing, I'd say the amps that best fit your criteria, but would have to be purchased used, would be Bel Canto Ref1000 MK I monoblocks, Belles 350A Reference stereo, or Belles 150A Reference monoblocks. You should know that the Belles amps perform best running balanced, IMO, but the 350A can be run single ended. The 150A Reference monos must be run balanced.

All these amps will drive your speakers extremely well, and they have input impedances of 50k Ohms (Belles 350A Reference) or higher, so they will work well will tube preamps.

The Belles amps run only slightly warm to the touch. The Bel Canto are stone cold.

I'd also recommend used Pass Labs X-250 or Plinius SA-250, but these run warm and are monster amps, so they don't really fit your requirements.

As far as new amps in your price range, I can't think of any at this time.