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Power amplifiers stereo — Nuprime Audio STA-9X

Description, images, technical data and specifications

Nuprime Audio STA-9X
Image source — © Nuprime Audio

The STA-9 is a Class A+D stereo amplifier. In stereo mode, its power is 120 watts per channel, but it can also work in mono amplifier mode with a power of 290 watts. The amplifier circuit is borrowed from the IDA-8, which is based on a high-impedance class A pre-stage and a Class D power stage. Thanks to this, the novelty sounds "almost lamp-like", but at the same time it is clear and reliable. The 95 dB signal-to-noise ratio is achieved by JFET transistors simulating triodes.

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Specifications

  • Model name

    STA-9X

  • Input sensitivity (mV)

    N/A

  • Input impedance (balanced) (Ω)

    47 000

  • Input impedance (single-ended) (Ω)

    47 000

  • Output impedance (balanced) (Ω)

    N/A

  • Output impedance (single-ended) (Ω)

    0.02

  • Max current (A)

    N/A

  • Output power (8Ω) (W)

    170

  • Output power (4Ω) (W)

    370

  • Gain (dBu)

    x28.5

  • Frequency response low +/- 3dB (Hz)

    10

  • Frequency response high +/- 3dB (Hz)

    50 000

  • Signal to Noise Ratio (dB)

    >90

  • Total Harmonic Distortion + Noise (0% global feedback) (%)

    N/A

  • Total Harmonic Distortion + Noise (100% global feedback) (%)

    0.005

  • Max power consumption (W)

    N/A

  • Damping factor

    N/A

  • Dimensions (mm)

    55 x 235 x 281

  • Weight (kg)

    4

  • Official link

    https://nuprimeaudio.com/product/sta-9x/

Nuprime Audio STA-9

Nuprime Audio AMG PRA

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