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NuPrime ST-10M

Reference Class Mono-Block Power Amplifier

The NuPrime ST-10M amplifier, like the NuPrime DAC-10 is a beautifully crafted work of audio art. It has leading edge industrial design that is unique in the world of audio components. The quality of construction is excellent and the way the component feels when you hold it in your hands tells you that it will provide years of enjoyment.

Offered in two stunning finishes, either the silver or the black components offer you a choice of style to match your personal design sensibility. Regardless of where it is displayed in your home it will be a statement of discrete elegance.

Just one listen will confirm that like the matching NuPrime DAC-10, the NuPrime ST-10M is at the very peak of audio performance. Music emerges from a pristine background, with delicate details and nuances intact. The music you enjoy is reproduced with precision and everything you hear is natural and true to life. With ultra-low distortion and near unmeasurable levels of noise, you can experience the truth and beauty of your music. With lightning-fast, wide-range dynamics all types of music are reproduced exactly as you would hear them live. The experience is complete with the vast soundstage that the NuPrime ST-10M creates. You will be immersed in the musical event and feel as if you are actually 'there'.

Simply stated, the NuPrime ST-10M offers an incredibly honest, life-like, musical experience.


The ST-10M Reference Class Mono Amplifier builds upon NuPrime’s fourth generation (V4) amplifier module from the ST-10 and brings it to the next level. The ST-10 was designed within the space limitation of its chassis and hence had a power system which was capable of providing 150W power output to each of the stereo channels. To really bring out the best of the V4 amplifier module, the ST-10M has a new 300W power supply for its mono channel. The entire design including the chassis has been optimized for the mono configuration, further lowering the cross channel interference.

The original 10A bridge rectifier has been replaced by a 50A Schottky diode, the capacitors upgraded 30,000 micro-Farad, and duly the power transformer is now rated at 300W. Improved circuit layout with careful component selection has allowed the ST-10M to have a lower noise floor than the ST-10

The NuPrime Sound 

    The ST-10M sounds more full bodied and rich, conveys greater immediacy and power as compared to the ST-10. The improved power delivery and reduced interference gives the instruments richer overtones and more natural decay. The soundstage is deeper and creates a greater sense of space. Imaging gains more solidity over the ST-10 which already has an impressive placement.

    The effects of the improvements could be heard on the following examples. The striking of piano keys demonstrates greater attack and faster transients, with a sound that naturally resonates with the piano body. Brass instruments sounds glorious, characterful and carries a natural sheen but not overly bright. Female vocals and high frequencies retains the signature of the ST-10 but is smoother on the ST-10M. In an ensemble, the tonality gains an extra notch of richness which makes the overall presentation more natural.

    With the ST-10M, every aspect of the ST-10 sound has been improved upon, which makes it truly a reference grade amplifier!


     Inputs: RCA: Un-Balanced input x 1 & XLR: Balanced input x 1
    Outputs: Speaker Out x 1
    Power Output (rated): 230W @ 8 Ohms, 320W @ 4 Ohms
    Power Output (peak): 270W @ 8 Ohms, 375W @ 4 Ohms
    Gain: x 28
    Input Impedance: 47k Ohms
    Snesitivity: 1.5Vrms to rated power
    Total Harmonic Distortion (THD): 0.01%
    Signal to Noise Ratio (SNR): 91dB @ 10W
    Frequency Response: 0Hz to 50kHz (-3dB)
    Standby Power Consumption: 0.9W at 115V outlet, 1.7W at 230V outlet
    Idle Power Consumption: 14W at 115V outlet, 14.8W at 230V outlet
    Worldwide AC voltage: (115 VAC / 230 VAC) with Voltage Select Switch
    AC Fuse: Slow-blow, 5A, 250VAC
    Dimensions: 59 mm H x 215.4 mm W x 394 mm D
    Weight: 6 kg
    Color: Black or Silver

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