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NuPrime ST-10 Reference LE class power amplifier BLACK

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NuPrime ST-10 Reference LE class power amplifier BLACK

NuPrime Audio Logo

Reference LE class power amplifier

The ST-10 amplifier is NuPrime's Reference LE (near-reference) power amplifier for listeners who require a reference-class amplifier at a somewhat lesser power rating of 2 x 150W (8 Ohm). NuPrime's sonic character stands well apart from - and indeed above - the soft, cushy sound we often associate with most tubed amplification and the dry, clinically edgy sound we often associate with solid-state and switching technology. Rarely does an amp achieve an ideal balance of richly textured timbres and harmonics, bottom-end authority, startling dynamics, exquisite low-level detail, and a fully revealed, fully dimensional sound stage against a backdrop of mile-deep silence.

The "LE" of Reference LE designates near-reference-class performance.  The fourth generation (V4 amplifier module) of this patented amplifier design outperforms its predecessor in several aspects:

• It lowers the noise floor by an astounding 20dB and elevates the output stage to 85% efficiency.
• Shortened circuit pathways result in a 20% improvement in through-put.
• Improved reliability in no-load condition and short circuit protection.
• Increased output current drive capability for low impedance speakers.
• Increased switching frequency to 600 KHz and an improved musical sampling rate.
• Improved S/N ratio and dynamic range.
• New linear power supply with a high-efficiency toroidal transformer.  Reduced high-frequency noise and strengthened low-frequency performance.
• Signal path avoids cross-linking capacitors, thus achieving a frequency response at DC level for pure musical enjoyment.
• Enhanced even-order harmonic (H2) circuitry resembling the most attractive features of tubed-amp sound without its drawbacks and limitations. 


The NuPrime Sound 

• Vast soundstage
• Wide, lightning-fast dynamics
• Ultra-low distortion and noise
• Music emerges from a pristine background, with delicate details and nuances intact



• Input:2 x RCA
• Output:Five-way binding posts
• Power Output:150W x 2 at 8 Ohms; 150W x 2 @ 4 Ohms
• Gain: X 28
• Input Impedance:23.5k Ohms
• Sensitivity:0.89 V to rated power
• THD+N:0.01%
• Frequency Response:0 Hz to 60,000 Hz
• S/N Ratio:110dB at 1W, 10W, 100W
• Dimensions:59 mm H x 215.4 mm W x 394 mm D
• Weight:6 kg

 NuPrime ST-10 rear panel



OUR TOP PICKS by The Absolute Sound

"...over the years I've reviewed and used plenty of digital power amplifiers from Bel Canto, Wyred4Sound, April Music, and others, and I appreciate what a well-designed model can bring to a system. And it happens that the ST-10 is the best digital power amplifier I've heard to date...

...Within their product categories the DAC-10H DAC/preamp and ST-10 basic power amplifier are priced at the lower mid-level, yet they both deliver a level of performance that could be considered exemplary regardless of their cost... ", - Steven Stone, download the guide here.


Awarded in The Absolute Sound 2017 Editor's Choice Awards

TAS Ed's Choice award 2017 




Front panel 

Would you like to know more about the NuPrime innovative amplifier design? Follow this link!




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