Product Code: ST-10M



Reference class power amplifier
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.

NUPRIME ST-10M 單聲道後級擴音機,Clarity NuPrime

NUPRIME ST-10M 單聲道後級擴音機,Clarity NuPrime


The original 10A bridge rectifier has been replaced by a 50A Schottky diode, the capacitors upgraded 30,000 micro-Farad, and duly the power transformer is now rated at 300W.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 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 more enveloping ambience around the listener. 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!


RCA: Un-Balanced input x 1
XLR: Balanced input x 1

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
Sensitivity: 1.5V to rated power
THD+N: 0.01%
Signal to Noise Ratio: 102dB at 1W, 10W, 100W
Frequency Response: 0Hz to 60kHz
Worldwide AC voltage: (115 VAC / 230 VAC) with Voltage Select Switch
AC Fuse: Slow-blow, 5A, 250VAC
Dimension: 59 mm H x 215.4 mm W x 394 mm D
Weight: 6 kg
Color: Black or Silver
Standby Power Consumption: 0.9W at 110V outlet, 1.7W at 230V outlet
Idle Power Consumption: 14W at 110V outlet, 14.8W at 230V outlet

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Dimensions 282 × 123 × 208 mm
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