Thoughts on mating ML ESL 11 A's to a butler TDB 2250 hybrid amp

I just demoed a bunch of different higher end amps with the 11As.  This is all about taste, really depends on the types of music you listen to and sound signature you like.

Biggest take away for me is that the ML electrostats are naturally warm and transparent speakers.  What you pair it with is really makes a difference and you can hear the differences pretty quick.  For me, the best pairing is an amp that has crisp highs, lush mids, controlled bass.  I ended up ordering the Luxman 509x to replace my MC452, which felt was a bit too warm for MLs.

If you do decide to go the class D route, you may want to check out the NAD amps/integrateds as well.  I haven’t heard them myself but seem like a good bang for the buck.

I keep poking around and discovered Manley 250 monos any thoughts on this amp paired to Martin Logan ESL11A using a Linn DSM as a source and pre amp

I would personally steer away from tube amplifiers with ML.  While I'm sure those Manley monos are very nice, they explicitly state the optimum speaker impedance is 5 ohm and the output impedance is 0.538 ohm.  The ML panels are very capacitive and the minimum impedance is 0.6 ohm at 20 kHz, so probably not a good match.  If you crave the tube sound I would look at a hybrid design, since you already have your source/pre.  For what its worth I have the predecessor to your ESL11A (Montis).  I power them with Pass INT-150.  I think Pass amplification works well with ML.  I'm sure there are many other (less expensive) alternatives that would work as well.

I heard Butler amps a few years back and thought they were very good. Now the Manley 250's would be in a different class altogether IMO.Since Audiotroy doesn't sell Butler anymore I could have guessed what he would have said! Oh well I'm sure you can read into his posts.

I definitely agree with jtucker on  the Manleys, the 11As are rated at 4 ohm average, dipping below 1 ohm, so don't thinks it's a good match.