2. amps-preamps
  3. 151869-63

NUPRIME EVOLUTION ONE-BEST CLASS D AMP ON THE MARKET

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. 

                                                            
                                          

                                                              
audiozen
douglas_schroeder
3,281 posts
 
Use in several systems would tell. Nothing else. 
audiozen OP
831 posts
 
Of course switching is a relevant factor, but the fact that Demians' finger prints all over this design is an indication that is an exceptional piece.
You cannot name one single engineer at Technics going back to 1980, that has designed high end components on the scale of the Spectral pieces designed by Demiam Martin. If that were the case, they would be way ahead of Accuphase, and that will never happen and wouldn't surprise me at all that Accuphase is exploring the Class D route. Facten, regarding my zeal for Belles, that was my last straw effort to stay in the
A/AB camp, but after experiencing my second hernia injury in recent months, and having surgery next week, I can no longer lift the heavy stuff. Wake up and smell the coffee and accept the fact that we are now in the 21st Century and the doors have already opened to NEW AGE AUDIO and this old A/AB technology is collecting dust. The ongoing perception in recent years that moving forward with Class D, lightweight designs is a venture we all look forward to, and Technics could've just as easily designed a lightweight Class D amp with GaN transistors with an excellent power supply as the Evolution One.
You would be better off buying Brunos' excellent Kaluga's also at $17K..
Technics makes outstanding direct drive turntables, but the fact that the companies engineers lack the ability to design a lightweight version of 
SE-R1 tells me they missed the mark. The ping pong game continues...
Musicphile vs.Technophile. 

facten
2,877 posts
 
@audiozen 

" regarding my zeal for Belles, that was my last straw effort to stay in the
A/AB camp, but after experiencing my second hernia injury in recent months, and having surgery next week, I can no longer lift the heavy stuff. Wake up and smell the coffee and accept the fact that we are now in the 21st Century and the doors have already opened to NEW AGE AUDIO and this old A/AB technology is collecting dust"

So A A/B  technology is now deemed antiquainted and collecting dust  because you can't lift an amp anymore; nice rationale. 
shertzy
14 posts
 
Owned the Nuprime Evos as a toe dip in to the class D world of high end, i sold them very quickly, clean crystalline sound they provide, big pin point sound stage, for sure but not music, you could be convinced they have soul unless you have something better to directly compare them with. As a former owner i would suggest trying many other amps before settling on the Evos. As the saying goes - just my 2 cents...
shertzy
14 posts
 
As an add on, I did later audition the Mola Mola's and quite liked them but not enough to part with the hard earns. I liked the low profile and power consumption on the Evo's, see, i do find genuine positives.
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