SRM-D50 drives STAX ‘s electrostatic earspeaker in an ideal form.
With the installation of a high-performance DAC, it supports various audio sources such as audio player and PC.

Supports various audio sources such as USB / optical / coaxial digital input, RCA analog input etc.
ESS DAC chip supports files with audio signal maximum DSD 5.6 MHz, PCM 384 KHz.
Adopt R core power transformer with less leakage flux.
Displays the strength of input signal with VU meter.
Adopted 4 mm thick nonmagnetic aluminum cover.

About Stax Headphones

Stax produce exclusively electrostatic headphones, or “earspeakers” as they call them, in Japan, since 1938.  Stax chose the electrostatic technology for its ability to produce transparent sound, and low weight for comfort/ergonomics, both due to the driver design not employing fixed magnets and moving coils, as opposed to other common headphone driver designs. The minimal weight of the driver ensures a very quick response to the signal, creating a more faithful sound reproduction.

The electrostatic driver creates sound when it is powered by static charge (bias voltage), which reacts to a high voltage signal field created around the driver element by the stators. For this reason, all electrostatic headphones require special amplification to supply the high voltage (DC) bias, and high voltage (AC) audio signal. In the case of modern Stax headphones, that DC bias is 580V. Stax manufactures a number of dedicated amplifiers for their headphones, ranging from a relatively small portable model, SRM-D10, to their flagship SRM-T8000.

Our Take

The SRM-D50 offers a complete electrostatic experience to plug-and-play on any desktop or audio rack. All you need is a USB or Coax digital audio connection, and you are good to go, for the first time ever from Stax! The amplifier section is quite powerful, and we think it performs a bit better than the SRM-353X.