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
snapsc
676 posts
 
Cherry Amps have been well reviewed for their sound characteristics... here is an interesting article... they have switching frequencies up to 2mhz and bandwidth.. depending on the amp at either 100 kHz or 150 kHz. 


https://positive-feedback.com/interviews/tommy-obrien-digital-amplifier-co/
three_easy_payments's avatar
three_easy_payments
2,097 posts
 
My interest was lost as soon as I read "world's finest" and reference to conventional AB amps as "prehistoric technology".  Nothing kills credibility like sensational hyperbole.
three_easy_payments's avatar
three_easy_payments
2,097 posts
 
Not a salesman but used to be a Nuforce dealer.  I smell a sales agenda.
mijostyn's avatar
mijostyn
8,570 posts
 
It's just cheap garbage designed for high profit. Radio Shack use to sell better stuff than this. My old TACT amps switched at 9 megahertz. Now that is PWM switching with a vengeance. In the end still didn't sound that good. Back to Class A and happy as a lark. 
audiozen OP
831 posts
 
lol's...mijostyyn. Cheap Garbage? Sounds like you don't want to leave the 20th Century. Designed for high profit? $8K for the pair of Nuprime and $17K for the Technics? Yeah,right. 
three-easy-payments..not a sales pitch at all. I sold my Nuforce REF 9's in late 2006 since the sound quality in the upper bands was terrible and the amps got so hot at times that I slightly burnt my hand one night when the amps went into overload and shut down, saying to myself, this is crap, never again. I never had interest again in Nuforce until two weeks ago, after waiting for months for Dave Belles to release his Virtuoso line, which is delayed over and over. I got tired of waiting for Godot. When I decided recently to explore Nuprime I was stunned that one of the top three circuit engineer's in high end audio during the past forty year's, Demian Martin from Spectral, is with the company. My conversation just days ago with Nuprime, I learned that Demian has been an ongoing consultant, but in the case of the Evolution One it goes much deeper. Demian is the co-designer of the Evo One and was part of the engineering team.The interior is so clean and organized that it reminds me of his board layouts in the Spectral Preamps he designed. If it wasn't for Demiam being involved, I would have no interest, and Demian has been my number one choice as a designer for the past thirty years.
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