NuPrime AMG One Mono Power Amplifier

AMG One mono amplifier

The AMG One is a scaled-down version of the Evolution Two with RMS power of 170W@8 Ohm and 220W@4 Ohm.

DESCRIPTION:

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:

• 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.

Related Power review from THE ABSOLUTE SOUND: 
https://www.theabsolutesound.com/articles/nuprime-amg-one-power-amplifier/

SPECS:

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 and OUT
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