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
audiozen OP
831 posts
 
I just recently sold my current system and I plan on purchasing a used 
Spectral DMC-10 that has been recently serviced and recapped in excellent condition. I could care less if it comes with an RC.The speakers in my new system will be the ELAC FS 249.3's with the jet 5 folded ribbon AMT tweeter.The best tweeter I have ever heard but I still have not decided on a digital source since I'm exploring streaming options. I don't care for the current solid state preamps on the market today. Not nearly as refined and smooth compared to Demians' designs.
mrdecibel
3,064 posts
 
@audiozen , back in the day, I sold, and installed, Spectral gear, as well as owning a few pieces. What I have not experienced, was a Spectral preamp driving another branded amp, and vis a versa. Always paired together. Also, only with MIT cables being used. It is my understanding, that because of the very wide bandwidth of the Spectral designs, matching to other products have not been good. What has been your experience ? I understand many, if not all, Class D amps have wide bandwidth. Thanks, MrD.
audiozen OP
831 posts
 
mrdecibel...I sent off an email to Demian Martin through the Nuprime site and just spoke to John Casler and he will forward it to Jason Lim to send to Demian regarding questions of the compatibility between the older Spectral Preamps and the Evolution One. I'll post Demians' response when received. Also, the DMC-10 matched very well with the HCA-3500 that I experienced back in 1992. 
georgehifi's avatar
georgehifi
10,312 posts
 
I can no longer lift the heavy stuff.
Ok, so that is the real reason for the b***h slap against the 119lbs weight of the Technics SE-R1, and that you don’t know the reason for it’s weight
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.
If you look and many of the "better" class-d’amps they have chosen to you use "heavier" "more expensive" "harder to make" linear power supplies.

Saying that, the Evolution may have a very good (for SMP) supply. One of the very best SMP’s I measured was in my Linn CD12 encased in it’s own cnc machined chamber, it performed great, but it was still not better in noise than the best linear supplies I seen and measured.

Cheers George
audiozen OP
831 posts
 
 George, again....I could care less regarding the topology of the Technics. If a designer can get it right resulting in outstanding performance from a light weight, well designed Class D amp, than its completely pointless to justify buying a 119 lb amp if there's no performance differences between the two. Are you a Technics dealer? 
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