NuPrime Evolution STA Power Amplifier

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  • Regular price $6,475.00

NuPrime Evolution STA Stereo Power Amplifier

The NuPrime Evolution STA offers a breakthrough in distortion reduction. Coined the Only Distortion Cancellation (ODC) design, NuPrime has continued advancing the state-of-the-art Class-D for the past decade. Reaching a similar performance level as the Evolution One monoblocks, the Evolution STA offers the best of the ST-10 and the AMG STA while improving the performance to a higher level.


  • NuPrime breakthrough Only Distortion Cancellation (ODC) Class D design.
  • Preamp stage and Class D oscillation circuit utilizing high-end NJR MUSES8820 op-amp.
  • 650KHz high-speed switching frequency allows greater resolution to be achieved.
  • The 550W high-power ultra-thin toroidal transformer power supply has been enhanced to deliver cleaner and more stable power with lower noise floor. The entire power path fully adopts 40A ultra-high current and low resistance terminals. Improve current dynamic capability. Total of 52,000uF power supply filter capacitors.
  • High quality copper PCB trace instead of usual cables are used to connect the power supply to the amplifier’s circuitry, maximizing power delivery.
  • Hybrid Class-D technology that retains the merits of both Class-A and Class-D amplification.
  • A stereo amplifier with dual mono implementation.


  • Power Output (RMS): 230W @ 8 Ohms , 310W @ 4 Ohms
  • Power Output (peak): 270W @ 8 Ohms , 360W @ 4 Ohms
  • Gain: x21
  • Sensitivity (to rated power): 2Vrms
  • Input Impedance: 47K Ohms
  • EVO STA WATT / THD / S/N (typical) : @5W (0.0025% ,95db) , @50W (0.007% , 105db) , @100W (0.01% , 110db)
  • Frequency Response: 10Hz to 50kHz (-3dB)
  • Trigger IN and OUT
  • Standby Power : 1.5W @ 115V outlet, 1.7W @ 230V outlet
  • Idle Power : 24W @ 115V outlet, 26W @ 230V outlet
  • Worldwide AC voltage: (115VAC / 230VAC) with Voltage Select Switch
  • AC Fuse : Slow blow , 7A , 250VAC
  • Dimension : 430mm x 372mm x 66.5mm
  • Weight : 10.5Kg
  • Package Dimension: 642mm x 594mm x 254mm
  • Package Weight : 14Kg
  • Color : Black or Silver

Customer Reviews

Based on 1 review
j falcon
Amazing Amplifier and Service

After many years, I recently had a dedicated home theater and listening room built in my home. While I love the spatial effects of an outstanding home theater processor my passion has always been about the music. Any audiophile will tell you, that when great music and a great recording is reproduced as the artist intended it can be a transcendent experience for the listener. You can find scores of audio companies who claim to be the holy grail of music reproduction and some will charge you more than a house for it, but most of us cannot afford to pay stratospheric prices for a marginal benefit in sound quality. For me it is all about value and the quality of the listening experience. Which leads me to NuPrime. Previously I had owned NuForce AVP 18 home theater processor in a mini home theater set up. For the money it was great. It was surpassed by new technology so when I built my home theater I went with an Anthem AVM 60 ( I have since upgraded to the AVM 70 ). I purchased Tekton Double Impact speakers for my fronts with the impacts for the surrounds and Tekton atmos in ceiling speakers. The Tekton speakers are spectacular. They are extremely neutral speakers that will reproduce what ever signal they are given with amazing accuracy. That is a blessing and a curse. They will reproduce every nuance and nails on a chalk board fault a mediocre amp and processor will muster. With a great amp and processor the Tektons are ethereal. So, initially I was using a pair of NuPrime MCH K38 eight channel amps for an 11.2 system. I thought that the MCH K38 with two channels bridged for my fronts and center sounded wonderful. Then I had trouble with my AVM 60 processor. Anthem blamed it on the amps.

That's where Amir comes in. There was nothing wrong with my amps. It was all about a faulty processor although Anthem will never admit it. They kept blaming another piece of equipment or cables. Any way, I decided to buy new amps. Amir convinced me to try the Evolutions. I also went with the MCX-4 for my surrounds. Amir kept saying you will not believe the difference. I was skeptical but I took the plunge and have never looked back since. The Tektons have an incredible soundstage and exquisite detailing without sounding processed(I am talking about you Golden Ear Triton Reference to name one ). When I paired the Tektons with the Evolutions the sound stage became massive. You would think was using the all channel setting . My installer who is an audiophile was blown away. With respect to the detail and midrange the word that best describes it is ethereal. It reminded me of the Magnaplanar 3.6 or Martin Logan Renaissance when we using the Clase processor but better. Vocals, for example, by Diana Krall or Sarah Bareilis were lilting and much more life-like. They sounded great-taking and felt as if they were singing right there in my theater. I could hear the subtle raspiness of Diana Krall in a way I have never heard before. The separation of the instruments was incredible. The bass was much tighter as well. I would stack the Evolutions up against amplifiers costing 10 X more. If you can afford the Evolutions or even if you can afford 10 X more do not think twice about splurging on the Evolutions they are worth every penny with a set up that will match their performance.

With respect to Amir and his customer service in my 30 years of pursing musical excellence I have never met any one that is as knowledgeable, honest and who will stand by their product as Amir. I had an issue with the MCX4 and Amir rectified it promptly without question or issue. In the audiophile world there are companies that will promise you the stars and when their equipment fails, they leave you stranded. No accountability. No respect for the client. Anthem is one of those companies. I wish I had met Amir sooner and I would have bought the NAD MC 17 he recommends instead of the Anthem. I may still do that. I have known Amir long enough now that I trust his ear and opinion implicitly. If he tells you something will sound amazing, it will. All I can say is that I will be buying all my future audiophile equipment from Amir. He is a treasure in a world full of snake oil salemen.