NuPrime STA-9X Power Amplifier
Best power amplifier for audiophiles seeking tube warmth with modern precision.
Experience pristine audio with the NuPrime STA-9X Power Amplifier. This versatile amplifier delivers 2 x 130W in stereo or can be bridged to a powerful 1 x 330W mono configuration. It masterfully emulates the warm sound of tube and Class-A amplifiers while offering superior speed and clarity thanks to its high 750kHz switching frequency. The improved linear power supply ensures reduced noise and enhanced low-frequency performance, creating a vast soundstage with lightning-fast dynamics and ultra-low distortion for an immersive listening experience.
$1199.00
More STA Options
Owner Satisfaction
4.6
/ 5
Category Rank
934
/ 1684
#934 in Power Amplifiers
Price vs Category Average
-85%
Below average
Power Output
213013308
/ x W / x W @ Ohms
Who it's for
- Audiophiles seeking high-fidelity transparency and musical nuance
- System builders planning for future scalability and speaker upgrades
- Minimalists needing high performance in a compact, cool-running form
Who should skip it
- Budget-conscious buyers avoiding the cost of an additional preamplifier
- Listeners who prefer a warmer, more colored sonic character
- Owners of power-hungry, low-efficiency speakers in large rooms
Performance breakdown
Sonic Character
Expertly balances tube-like warmth with the precision of modern solid-state design.
Dynamic Range
High switching frequency delivers lightning-fast transients and impressive musical impact.
Power Versatility
Bridgeable mono mode provides significant headroom for demanding speaker setups.
Signal Purity
Ultra-low distortion levels ensure a clean, transparent, and highly immersive soundstage.
Build Efficiency
Compact footprint houses a sophisticated power supply without sacrificing thermal stability.
Connectivity Options
Balanced XLR and RCA inputs offer flexible integration for high-end systems.
Key Specs
Power Output
2 x 130W / 1 x 330W @ 8 Ohms
Peak Output Power
2 x 170W / 1 x 370W @ 8 Ohms
Input Impedance
47k Ohms
Gain
x 28.5
Signal to Noise Ratio
> 90dB
Total Harmonic Distortion
0.005% (Stereo/Mono)
Frequency Response
10Hz to 50kHz
Power Supply
Worldwide AC voltage (115 VAC / 230 VAC)
Features
- Tube and Class-A sound emulation
- Bridgeable for stereo or mono
- Exceptional speed and clarity
- Improved dynamic impact
- Reduced noise and enhanced bass
- Pure audio reproduction
- Vibration-absorbing feet
- Vast soundstage and wide dynamics
What customers say
Customers consistently praise the NuPrime STA 9X Power Amplifier for its exceptional sound quality and remarkable value. Many highlight its ability to deliver a clear, detailed, and powerful audio experience, often exceeding expectations for its compact size and price point. Users appreciate the amplifier's refined sonic presentation, noting its impressive dynamics and precise imaging. The consensus points to a product that offers high end audio performance without the typical high end cost, making it a compelling choice for discerning listeners seeking both sonic excellence and smart investment.
Know before you buy
Yes, the STA-9X is bridgeable. You can switch it from its standard 2 x 130W stereo configuration to a powerful 1 x 330W mono mode for increased output and drive.
The STA-9X is designed to emulate the warm, harmonic characteristics of tube and Class-A amplifiers. It achieves this while maintaining the speed, clarity, and low distortion typical of modern high-performance solid-state designs.
The unit features both RCA and XLR inputs, allowing for flexible connectivity with a wide range of preamplifiers and source components.
The STA-9X features a universal power supply that supports worldwide AC voltages, meaning it can operate on both 115 VAC and 230 VAC systems without modification.
The upgraded power supply reduces background noise and improves low-frequency performance. This results in a cleaner signal path, tighter bass response, and a more expansive soundstage.
The amplifier is quite compact, measuring 9.25 inches wide, 11 inches deep, and 2.36 inches high. It is designed to fit easily into most standard audio racks or desktop setups.
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$1199