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Headphones amplifiers — Stax SRM-400S

Description, images, technical data and specifications

Stax SRM-400S
Image source — © Stax

The Stax SRM-400S looks like the SRM-500T (even the dimensions are the same!), but unlike the older model, it uses a classic transistor path (which, in fact, means the letter S, not T, which is used for the lamp). The amplifier has a balanced output (and previously it appeared only in the "X" version from 353, although it was very much requested in this class of equipment), as well as separate transformers for low-current and high-current circuits and a new rigid chassis.

Specifications

  • Model name

    SRM-400S

  • Maximum Power, 32 Ohms (mW RMS per channel)

    N/A

  • Maximum Power, 50 Ohms (mW RMS per channel)

    N/A

  • Maximum Power, 300 Ohms (mW RMS per channel)

    N/A

  • Maximum Power, 600 Ohms (mW RMS per channel)

    N/A

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

    N/A

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

    90 000

  • Gain (dBu)

    60

  • THD (% at 1V RMS, 300 ohms)

    0.01

  • Signal to Noise Ratio (dB)

    N/A

  • IMD (%, CCIR, 300 Ohms)

    N/A

  • Crosstalk (dB, 20Hz-20KHz, 300 Ohms)

    N/A

  • Output Impedance (Ohms)

    N/A

  • Dimensions (mm)

    195 x 102 x 376

  • Weight (g)

    3400

  • Official link

    https://staxaudio.com/driver/stax-srm-400s

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