I'm not salesman, just a senior audiophile and I have decided in recent months that I'll never go back to conventional AB
amps since its prehistoric technology going back 50 tears. The subject here is currently the worlds finest Class D amp in its price range and beyond, right behind Patrik Bostroms' massive Class D Marten M amplifier. I wouldn't waste my time with Brunos' Mola Mola Kaluga, since the Nuprime technology is newer and has moved further on. The Evolution One has technology that is a first in the industry. Ten years ago, the real problem with Class D amps and today as well, is that their transistor switching modulators operate at a frequency around 300khz which is to low causing feed back problems to the upper frequency's resulting in cold hard sound from the tweeter. Brunos' Kaluga switches at 500khz which is still not good enough, resulting in the Evoultion One being the only Class D amp in the world to switch modulate at 700khz. Also, the only Class D amp on the market with an input impedance of 1 million ohms. Phew! So the issue of working with different Preamps is redundant and completely irrelevant and will work perfectly with any Preamp on the market, tube or solid state. Their switching amps are custom designed in house and are patented. For those concerned about speaker 2 ohm impedance loads read the recent review in Totally Wired where the Monitor Audio Studio's were used and are 2 ohm loads and the amps ran cool. Also, legendary circuit engineer Demian Martin from Spectral has been an ongoing consultant for the company. 


Thanks! The Rowland 625 and 625 S2 are exceptional stereo amps, utilizing Class AB output stages with Rowland’s proprietary power factor corrected tightly regulated switched mode power supplies.
Thanks! The Rowland 625 and 625 S2
Great linear amps, I’d back them over Class-D any day, except maybe the Technics SE-R1. Now that would be a good/interesting shootout.

Cheers George
bigkidz and shertzy...The Evoultion Ones take a very  long time to burn in, a good 1000 hours before they sound their best. Which does not surprise
me since Demain Martin from Spectral is co-designer of the amp. Spectral has a policy going back many years and through today, that they burn their amps in 1000 hours before boxing them and shipping off to their dealers.
How do the Nuprime Evolution One monoblock amplifiers compared to the Merrill Veritas monoblock amplifiers?
I realize there's a LARGE price difference.
I have no experience with Class D amplifiers.
Our system strives to create the illusion of a live performance, so that is how I evaluate a components performance.
We're enjoying a pair of Pass XA-200.5's with our Sasha I speakers.
Any insights you can provide would be of great interest.
The Evoultion Ones take a very long time to burn in, a good 1000 hours before they sound their best
What a crock of  ****