Best amp for Wilson Sabrina

brentjsimon


I believe Boulder uses complimentary BJT (bi-polar) output transistors in their amps, these are far better for current delivery into low impedance, and better suited to low impedance and -phase angle EPDR load of the Sabrina than complimentary Mosfets (Pass) would be, I don’t know what the other amps use.

From 50hz to 200hz they have an nasty loading for amps to see, especially at 75hz.
https://www.stereophile.com/images/416WiSabfig1.jpg

https://absolutehiend.com/media/wysiwyg/pdf/AEBoulder866.pdf

Cheer George

D'Agostino, Ayre and Luxman should be on your list to listen to.

brentjsimon
To boot brent, the Boulder has an dac in it as well, which is based around Boulder’s flagship 2120 DSD DAC

http://boulderamp.com/products/2120-digital-to-analog-converter/
Cheers George

I can’t speak to the Sim Audio or Goldmund but I had the Pass and Boulder at the same time and tested both with Wilson Audio Sasha 2’s. The Pass is a really terrific amplifier but to my ears on the Sashas, the Boulder was clearly superior. The dac and streamer is surprisingly good. The dac section gives up nothing to the Aqua La Scala Mkii Optologic from one of my other systems. As an aside, I also chose to purchase the Boulder and previously passed on a Gryphon Diablo 300. As a matter of fact, this is my second Boulder 866 purchase. I dont know how they did it for less than $20,000. Go hear one to see what you think. It may or may not impress you equally but its astonishing what Boulder has achieved with this one.

brentjsimon

With that A/B and endorsement from ghasley , looks like the Boulder is a no-brainer 

Cheers George