NuPrime Evolution STA Stereo Amplifier
Best high-fidelity amplifier for audiophiles seeking warmth and precise sound.
The NuPrime Evolution STA stereo amplifier delivers pure and natural sound with Class A-like warmth and substantial power. Featuring a true dual mono design and NuPrime's exclusive 'Only Distortion Cancellation' (ODC) technology, it significantly reduces distortion for a clean background and exceptional clarity. Its hybrid Class D technology combines the best of Class A and Class D amplification, offering warmth, speed, and power. The amplifier boasts a robust 550W toroidal transformer power supply for clean, stable power and supports high-current delivery. With balanced XLR and unbalanced RCA inputs, it provides a wide and deep soundstage, bringing your favorite music to life with remarkable fidelity.
$3499.37
Owner Satisfaction
4.7
/ 5
Category Rank
56
/ 560
#56 in Audio & Video Receivers
Price vs Category Average
+33%
Above average
Power Output (RMS)
23083104
/ W @ Ohms, W @ Ohms
Who it's for
- Audiophiles seeking transparent sound and intricate musical detail
- Listeners needing efficient power for demanding speaker setups
- System builders requiring flexible stereo or monoblock configurations
Who should skip it
- Budget-conscious buyers looking for entry-level audio components
- Traditionalists preferring the warm, organic sound of Class A amplifiers
- Minimalists wanting an all-in-one integrated amplifier solution
Performance breakdown
Sonic Clarity
ODC technology effectively eliminates distortion for a remarkably pristine background.
Power Delivery
Robust toroidal transformer ensures stable, high-current output for demanding speakers.
Stereo Separation
True dual mono architecture creates an expansive and precise soundstage.
Hybrid Efficiency
Class D efficiency meets the rich, warm character of Class A.
Build Integrity
Premium Furutech connectors and copper PCB traces reflect high-end construction standards.
Signal Resolution
High-speed 650KHz switching frequency captures intricate musical details with ease.
Key Specs
Power Output (RMS)
230W @ 8 Ohms, 310W @ 4 Ohms
Power Output (peak)
270W @ 8 Ohms, 360W @ 4 Ohms
Gain
x 21
Sensitivity (to rated power)
2Vrms
Input Impedance
47K Ohms
THD / S/N (typical)
@5W (0.0025% ,95db) , @50W (0.007% , 105db) , @100W (0.01% , 110db)
Frequency Response
10Hz to 50kHz (-3dB)
Standby Power
1.5W @ 115V outlet, 1.7W @ 230V outlet
Features
- Dual mono design for superior stereo separation
- Hybrid Class-D technology for Class-A warmth and Class-D efficiency
- NuPrime's breakthrough Only Distortion Cancellation (ODC) Class D design
- High-speed 650KHz switching frequency for enhanced resolution
- Robust 550W toroidal transformer power supply for clean and stable power
- High-quality copper PCB trace for maximized power delivery
- Balanced XLR and unbalanced RCA inputs with Furutech connectors
- Eichmann speaker binding posts for secure connections
What customers say
Customers consistently praise the NuPrime Evolution STA Stereo Amplifier for its exceptional sound quality, often describing it as remarkably clear, detailed, and powerful. Many highlight its ability to reveal new nuances in familiar recordings, creating an immersive listening experience. The amplifier's sleek, minimalist design and robust build quality also receive frequent commendation, reinforcing a sense of premium craftsmanship. Users appreciate its refined aesthetic and the solid feel of its construction, contributing to a highly satisfying ownership experience.
Know before you buy
The ODC design is a proprietary circuit that actively identifies and subtracts distortion from the signal path. This results in a significantly cleaner background and improved clarity, allowing you to hear more detail in your music without the harshness often associated with high-power amplifiers.
While traditional Class D amps focus primarily on efficiency, the Evolution STA uses a hybrid approach to bridge the gap between Class A and Class D. It provides the high-speed, high-efficiency power delivery of Class D while incorporating circuit refinements that produce the natural, warm tonal characteristics typically found in Class A designs.
Yes, the Evolution STA is equipped with both balanced XLR and unbalanced RCA inputs. It uses high-quality Furutech connectors for both, ensuring a secure and reliable connection regardless of which input type your preamplifier or source component uses.
With 310W per channel at 4 Ohms and a robust 550W toroidal transformer, the Evolution STA is designed to handle difficult speaker loads with ease. Its high-current delivery and large 52,000uF capacitor bank ensure it maintains stable performance even when speakers demand sudden bursts of power.
The dual mono design uses separate power and amplification paths for the left and right channels. This physical and electrical separation minimizes crosstalk, resulting in a wider, deeper soundstage and more precise imaging.
While the amplifier is efficient, it will perform at its best after a short period of operation once the internal components reach a stable thermal state. Because of its hybrid design, it reaches this state relatively quickly compared to pure Class A amplifiers.
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$3499