BEST AMPS FOR WILSON SASHA

I would look at pbn audio amplifiers they are the best

I have Sashas powered by Pass XA-160.5's. Wonderful match.  I agree with other posts that the older XA100.5 would be lacking along with most tube amps (unless very high wattage mega-buck units).  The newer XA100.8 is more capable than the XA100 Point 5, so I think you would be fine driving the very low impedance below 100 Hz, which is less than 1.8 Ohms. 

You could buy a valve amplifier with an output transformer to get the impedance and current drive you need to drive the Sasha. You’ll adore the ’warm’ sound, a.k.a harmonic distortion, and convince yourself it is ’technically pure’, even though the amplifier is technically not capable of fulfilling the requirements of the speaker.

Alternately, you could buy a high current, low damping factor solid state amplifier that is ’technically pure’, but perhaps you won’t enjoy the sound so much.

What does you ear like the sound of?

Listen, be happy, buy it.

Someone has heard dartzeel 8550 with wilson sasha?

I have owned a pair of Sasha's for a number of years.  I had heard them at shows and dealers and just liked the way they play music.  I just upgraded my amps from the Cary 500MB solid state monoblocks to the new PS Audio BHK 300 monos.  (The Carys put out 500 watts into 8 ohms, 1000 into 4 ohms.). The change with the PS Audio amps include greater detail and separation among the instruments, a slightly warmer sound (which I like) and a wider soundstage.  There is no question about enough power, the bass is melodic and very present.  And they're not even fully broken in yet!