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The NuPrime STA-9 power amplifier are characterized by …

– an exceptionally clean, grain-free, clear sound image, which not least promotes a very pleasant, organic-looking tone color representation.
– tonal neutrality. Depending on the loudspeakers connected, it tends to be a bit livelier, fresher in high frequencies in stereo mode, and a bit more relaxed / confident in mono mode. Either way, the sound is absolutely consistent and coherent.

– good fine and coarse dynamics, but the STA-9 are only suitable to a limited extent for very high volumes.
– a flawless resolution, only the last bit of high-frequency tracing could be missing by meticulous listeners – it is praiseworthy that the precision of the STA-9 is not associated with any severity, it delivers a pleasant long-term sound image.
– a well-balanced voice or mid-range reproduction.
– a sufficiently open, stress-free and harshness-free high-frequency range, the highest altitude air cannot be sniffed quite as clearly with the STA-9.
– excellent spatiality: location sharpness and plasticity are in no way inferior to much more expensive amps.
– rather sober, but immaculate workmanship. The mechanical quality of the switches and interfaces is reliable.
– Efficiency: A STA-9 draws just under 13 watts when idling.
– by what it takes to be a price-sounding blast, if the attached loudspeaker fits, it is advisable to experiment with both the stereo and mono version.

– Jörg Dames |  Fairaudio



  • Inputs:
    • RCA: Un-Balanced input x 1
    • XLR: Balanced input x 1
  • Outputs:
    • Stereo Speaker Out x 1 or
    • Mono Speaker Out x 1
  • Power: 2 X 120W / 1 X  290W @ 8 & 4 Ohms
  • Peak Output Power: 2 X 280W / 1 X 320W @ 8 & 4 Ohms
  • Input Impedance: 47k Ohms
  • Input sensitivity: 232.8mV, 1W @ 8 Ohms; 1.4V to rated power
  • Gain: x 22 (x 42 for mono)
  • Signal to Noise Ratio: < -95dB at 1W, 10W, 100W
  • Dynamic range: -115dB to 0dB at 1kHz
  • THD+N: 0.02% (Stereo) / 0.01% (Mono)
  • Frequency Response: 10Hz to 50kHz
  • Worldwide AC voltage: (115 VAC / 230 VAC) with Voltage Select Switch
  • AC Fuse: Slow-blow, 3A, 250VAC
  • Dimension:  235 mm W x 281 mm D x 55 mm H (including feet)
  • Weight: 4.75 kg
  • Color: Black or Silver
  • In a 110V outlet, the idle-power consumption is below 14W. In a 230V outlet, the idle-power consumption is below 16W.


Link to product: NuPrime Audio STA-9
Link to review: Fairaudio.de
Link to review: The Absolute Sound
Link to review: Totally Wired
Link to review: hificlass
Link to review: AudioStereo
Link to review: On-Mag
Link to review: Sempre Audio
LInk to review: Storetest!
Link to review: AudioStalker


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