NuPrime AMG One Power Amplifier
Best power amplifier for audiophiles seeking transparent, high-fidelity sound reproduction.
Experience unparalleled audio fidelity with the NuPrime AMG STA Power Amplifier. This bridgeable stereo amplifier is engineered for exceptional performance, merging advanced Class A and Class D modules for robust power delivery. Its class-leading 1M Ohm input impedance ensures pristine signal integrity, while the high-speed switching frequency and high instantaneous current provide dynamic sound reproduction. Housed in a meticulously crafted aerospace aluminum alloy chassis, the AMG STA delivers a transparent and detailed sonic experience with natural harmonic enrichment, creating a focused soundstage.
$1299.00
Owner Satisfaction
4.7
/ 5
Category Rank
421
/ 1684
#421 in Power Amplifiers
Price vs Category Average
-84%
Below average
Stereo Power Output
2130822004
/ x W @ Ohm; x W @ Ohm
Who it's for
- Audiophiles seeking analog warmth with modern digital efficiency
- Listeners using power-hungry speakers requiring high current delivery
- Purists prioritizing sonic clarity and a silent background
Who should skip it
- Budget-conscious buyers looking for entry-level audio solutions
- Users wanting an all-in-one system with integrated streaming
- Traditionalists preferring the specific coloration of pure tube amplifiers
Performance breakdown
Signal Integrity
The 1M Ohm input impedance preserves delicate source signals with remarkable purity.
Dynamic Power Delivery
High instantaneous current ensures effortless handling of demanding musical transients.
Sonic Transparency
Hybrid Class A and D design delivers a detailed, natural soundstage.
Build Quality
Aerospace-grade aluminum chassis offers both structural rigidity and sophisticated aesthetics.
System Versatility
Bridgeable architecture allows for flexible stereo or high-power mono configurations.
Distortion Control
Ultra-low THD+N levels ensure a clean, fatigue-free listening experience.
Key Specs
Stereo Power Output
2 x 130W @ 8 Ohm; 2 x 200W @ 4 Ohm
Mono Power Output
300W @ 8 Ohm; 320W @ 4 Ohm
Frequency Response
10Hz to 50K Hz ±0.2dB @ 8 Ohm
Total Harmonic Distortion (THD+N)
0.006%
Signal to Noise Ratio
100 dB @ 10W
Input Impedance
1M Ohm
Amplifier Classes
Class A, Class D
Power Supply
380W special winding power transformer
Features
- Bridgeable stereo power amplifier
- Class-leading 1M Ohm input impedance
- High instantaneous current for dynamic power
- Combines Class A and Class D modules
- 700kHz high-speed switching frequency
- Premium aerospace aluminum alloy chassis
- Ultra-high input impedance via JFET
- Smooth and detailed sound signature
What customers say
The NuPrime AMG One Power Amplifier earns high praise for its exceptional sonic performance and value. Users consistently highlight its remarkable transparency and dynamic control, noting its ability to drive demanding speakers with tight, articulate bass. The amplifier delivers an engaging musicality, often described as having an analog warmth despite its advanced Class D technology. Reviewers frequently observe superior soundstage depth compared to similarly priced units. While the initial investment is significant, the consensus is that the AMG One provides reference level performance typically found in much costlier designs. Build quality is also rated as superb, confirming its status as a premium, long lasting audio component.
Know before you buy
The ultra-high 1M Ohm input impedance minimizes signal loading, which allows the amplifier to preserve the integrity of the source signal. This results in a more transparent, detailed, and natural sound compared to standard amplifiers.
Yes, the AMG One is bridgeable. When configured in mono mode, it delivers 300W into 8 Ohms or 320W into 4 Ohms, providing significantly more power for demanding speakers.
By blending these technologies, the amplifier captures the rich, harmonic warmth typically associated with Class A designs while maintaining the efficiency, speed, and dynamic power delivery of Class D.
With 130W per channel at 8 Ohms, this amplifier is well-suited for a wide range of bookshelf and floorstanding speakers. Its high instantaneous current capability ensures it can handle complex musical passages and maintain control over difficult speaker loads.
While it works with most standard preamplifiers, the high input impedance makes it particularly compatible with a wide variety of sources, including those with tube-based output stages, without signal degradation.
The amplifier features RCA inputs for your source and high-quality binding posts that accept both banana plugs and bare wire for your speaker connections.
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