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This product will ship a few weeks after the Lockdown ends.

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7 Days Replacement

Yay! This item is eligible for replacement.

This product is eligible for a replacement if the return request is raised within 7 days of delivery, and ONLY in the unfortunate event that it is found to be defective. This policy is not applicable to customers who are not happy with the product.

Once the manufacturing defect has been confirmed by our inspection team, we will provide a replacement of the originally ordered product. In case of replacements not being available, you can choose another variant, full store credit or a full refund will be provided.

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  • Your Earspeakers’ Best Friend

    The SRM-252S has been exclusively designed for STAX earspeakers. This driver unit works as an amplifier. Pair your headphones with the SRM-252S and enjoy the best that the world of music has to offer.

    Connects to All

    With its high-quality PRO-bias 5-pin connector, the STAX SRM-252S can directly connect to a portable audio player, CD player or PC via its audio output terminal. You can also simultaneously connect it to a loudspeaker thanks to the parallel output terminal.

    The Finest Music

    New high-voltage transistors and low-noise FETs are carefully selected for the best audio experience. Smooth and rich sound is produced by the output stage thanks to the emitter-follower configuration. The class-A amplification does not have any coupling capacitors. This lets you hear your music with every detail crystal-clear.

    Beauty with Functionality

    The SRM-252S features a simple design that is high on functionality. This driver unit is the size of a CD jacket case. The aluminium extrusion chassis does away with the heat caused by the inbuilt class-A DC amplifier while at the same time, improving its reliability.


  • Specifications

    Frequency response:
    DC- 35 kHz (40Vr.m.s. output SR-207, when using one unit)
    Rated input level:
    125 mV with 100V output
    Maximum input level:
    30 V r.m.s. with volume at minimum setting
    58 dB (x800)
    Total harmonic distortion:
    max. 0.01% (1 kHz / during 100 V r.m.s. output) 
    Input impedance:
    50 kΩ (RCA) 
    Maximum output voltage:
    280 V r.m.s. / 1 kHz 
    Standard bias voltage:
    DC580 V (PRO bias)
    Power consumption:
    DC12V, 4W/ Exclusive AC adaptor attached For your area
    Temperature range for use:
    Between 0º and 35ºC, max. 90% (no condensation)
    External dimensions:
    132 (W) × 38 (H) × 132 (D) mm (without Knob, Pin jack)
  • Warranty

    Don’t sweat it, This Stax product is covered by a 1 Year manufacturer's warranty.
    Learn more

  • Frequently Asked Questions

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