The NuPrime AMG ONE is a scaled-down version of NuPrime Evolution Two and offers a breakthrough in distortion reduction. We called that Only Distortion Cancellation (ODC) design, continued advancing the state-of-the-art Class-D for the past decade.
A typical feedback error correction design inverts the output signal for summation with the original input signal to derive the negative error signal, which adds to the next cycle of the input signal to form a more accurate output signal. Nunprime’s ODC Class-D design derives the error signal from MOSFET devices and the output filter circuit directly, significantly reducing the negative feedback signal, which resulted in a substantial reduction in distortion THD+N of 0.003% @1kHz(5W), 0.004@ 1kHz(50W) and less than 0.006% THD+N at 1KHZ(2W~80W). This breakthrough improvement in Class-D design resulted in a natural and pure sound characteristic.
Notable Features
- NuPrime breakthrough Only Distortion Cancellation (ODC) Class D design.
- Preamp stage and Class D oscillation circuit utilizing high-end NJR MUSES8820 op-amp.
- 600KHz high-speed switching frequency allows greater resolution to be achieved.
- The 250W high-power toroidal transformer power supply has been enhanced to deliver cleaner and more stable power with lower noise floor. The entire power path fully adopts 15A ultra-high current and low resistance terminals. Improve current dynamic capability. Total of 22000uF(one channel ) 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. - A mono implementation.
The AMG ONE sound characteristics can be described as:
- Wider and deeper soundstage with no loss of clarity at the greatest depth. With large-scale orchestral recordings, you will be able to have a clear image of the last rows of percussion and wind, even the subtle pedal sounds! Such details are presented in a truthful manner without artificial enhancements.
- Faster dynamics with a greater range
- Natural and pure due to ultra-low distortion
- Cleaner background that provides greater detail and nuances
- Class-A like warmth
SPECIFICATIONS
- Power Output (RMS): 170W @ 8 Ohms , 220W @ 4 Ohms
- Power Output (peak): 210W @ 8 Ohms , 260W @ 4 Ohms
- Gain: x 21
- Sensitivity (to rated power): 1.7Vrms
- Input Impedance: 47K Ohms
- AMG ONE WATT / THD / S/N (typcial) : @5W (0.003% ,95db) , @50W (0.004% , 105db) , @100w (0.03% , 110db)
- Frequency Response: 10Hz to 50kHz (-3dB)
- Trigger IN (> 5V/200mA) and OUT (12V)
- Standby Power : 0.4W @ 115V outlet, 0.4W @ 230V outlet
- Idle Power : 8W @ 115V outlet, 7.5W @ 230V outlet
- Worldwide AC voltage: (115VAC / 230VAC) with Voltage Select Switch
- AC Fuse : Slow blow, 5A , 250VAC
- Dimension : 285mm x 235mm x 55mm
- Weight : 5kg
IMPORTANT: Do not connect both RCA and XLR inputs and use the toggle switch to select between the two inputs. The toggle switch is only for configuring the RCA or XLR inputs.
Amp & Preamp (3)
In some applications, the speaker outputs from the power amplifier are used as source signals for devices such as REL sub woofer. For such application, usually the receiving devices should have DC offset blocking capability because some amplifier by design has floating ground (DC offset) on the speaker outputs.
The following models have no DC offset on the amplifier speaker outputs and the negative terminal is also the ground:
NuPrime STA-9, MCH-K38, IDA-6, IDA-16, STA-9X, AMG STA
The following models’ speaker outputs can not be connected directly to sub woofer input:
NuPrime Reference 20, ST-10, IDA-8, ST-10M, Evolution One, Evolution Two, Evolution STA, AMG One, MCX-1,2,3,4
REL has provided instructions for connecting Class-D amp with floating speaker outputs to their sub woofers, please contact REL. All currently shipping REL sub woofers can be connected directly to any Nuprime amps.
IDA-8 is an extremely popular and award winning integrated amp. New users are welcome to read this long topic on audiocircle.com: http://www.audiocircle.com/index.php?topic=134697.0
When a device has a 12V trigger input, it is designed to be turned on when a 12V is detected. You can use any standard male to male 3.5mm (3-pin type) cable.
https://components101.com/connectors/35mm-audio-jack
The Tip section is +12V, the bottom Sleeve section is GND, and the middle Ring section is not used. Nuprime’s trigger design uses 3.5mm stereo cable pin 1 and pin 3. A mono trigger cable shorts pin 2 and pin 3, it can be used to connect the Nuprime device to another device’s trigger that only uses a mono cable.
NuPrime AMG One Review By The Absolute Sound
After all the tweaking was complete, I became fully aware of a highly transparent, wide, and deep soundstage, featuring well-defined image outlines. On a well-recorded choral track such as “Shenandoah” by Cantus, I was startled by the 3D presentation of individual voices. It became clear that the AMG One could deliver a spatial impression that most solid-state amps can only dream of. Bass extension and impact were superb. Upright bass pitch definition was spot on, while tympani strikes took off with satisfying punch. Even in a fairly large room, power reserve was adequate for the DeVille. Transient speed and control were also noteworthy, which accounted for vinyl surface noise being non-intrusive.
