Amp Comparison & Sonic Characteristic
Read this article about NuPrime’s hybrid Class D amp designs that put them on par with the best Class A and Tube amps.
The NuPrime Sound
– Vast soundstage
– Wide, lightning-fast dynamics
– Ultra-low distortion and noise
– Music emerges from a pristine background, with delicate details and nuances intact
We advice customers to make their selection based on sonic preference and usage scenario. In particular, higher price model does not necessary mean that it is better.
|Relative Ranking of Power Amps|
Models that are in the same cell are ranked the same.
|Power||Dynamic||Resolution||Sound Stage||High Freq. Extension||Bass Extension||Warmth||Texture|
|MCX-1||MCX-2||Evo. One||Evo. One||Evo. One||Evo. One||Evo. One||AMG STA||Evo. One|
|Ref 20||Ref 20,|
ST-10M, AMG STA (mono), STA-9 (mono)
|Ref-20||ST-10, AMG STA (stereo)||IDA-8,|
STA-9 (stereo), STA-6, IDA-6
STA-9, STA-6, IDA-6
IDA-8, STA-6, IDA-6
ST-10, STA-6, IDA-6
IDA-8, STA-6, IDA-6
|IDA-8, STA-6, IDA-6|
A class-D amp product is consisted of three main components:
Preamp Stage, Class D Stage, Power Supply (note that this Preamp Stage is not the volume control preamp, but an integral front-end of the Class D amp design)
Class D Stage design can be Half Bridge (H) or Full Bridge (F).
Power supply can be Switching Power Supply (SMPS) or Linear Power Supply (LPS)
Below is an illustration of how we created the unique sonic characteristic for each product:
Practically all the amp products on the market use Op Amp for preamp stage. Only a few very high end products use discrete transistors design. Discrete transistors design is costly and challenging to accomplish.
So let’s spend a moment discussing an amp’s sonic characteristics. Let’s begin by admitting that there’s no such thing as a perfect-sounding amp. Further, some characteristics are poles apart from others. For example, a warm-sounding amp produces a fair amount of even-order harmonics. And it certainly won’t be as neutral-sounding as an amp that produces none. A recording engineer might like to employ both styles of amplification – a super-clean amp as his reference and a warmer amp to help shape the end-product. In the listening is the MCX better than ST-10? Not at all. However, if you watch a lot of movies and enjoy to a wide variety of musical styles, you might prefer MCX. If your thing is classical music in its entire vast and dramatic splendor, you will likely go for Evo One or ST-10. Conversely, if vocals are your passion, you will likely prefer the MCX or STA-9 over ST-10. For an even warmer tone with a smooth and laid-back sound, the AMG STA allures with jazz and blues.
|Product||Preamp Stage||Class-D Power Stage||Power Supply||Sound Characteristic|
|Evo One||Class A Transistor Module||Full bridge||LPS|
Neutral, dynamic, smooth, refined, powerful, deep bass.
|ST-10, ST-10M||Op-Amp||Full bridge||LPS|
Neutral, dynamic, smooth & refined sound
|AMG STA||Class A Transistor Module||Half bridge||LPS|
Warm, smooth, refined and laid-back
Neutral, detailed, dynamic, and powerful sound
|IDA-8||Class A Transistor Module||Half bridge||LPS|
Just a little warmth and dynamic
|STA-9||Class A Transistor Module||Half bridge||LPS|
Tube-like, warmth, and dynamic
|MCX||Class A Transistor Module||Half bridge||SMPS|
Dynamic, powerful, a little warmth, detailed, for movies and music
In conclusion, we advice customers to make their selection based on sonic preference and usage scenario. In particular, higher price model (from NuPrime’s own selections or from competitors) does not necessary mean that it is better.