Features
- Electrostatic energiser/DAC for Stax Electrostatic Earspeakers
- Analogue sources can also be connected
- ESS ES9018 DAC with TI OPA1642 Op-Amp
- XMOS USB Interface with DSD128 and 384kHz Support
- Multiple Digital Inputs: USB, S/PDIF, Optical
- Analog Input via RCA
- Discrete Component Amplifier Circuitry
- A useful VU meter is cleverly housed in the front of the display
- Standard STAX 5-Pin connector for all STAX headphones

Specifications
Frequency response | 20Hz – 40kHz (+/-3dB) |
Rated Input Level | 130mV r.m.s |
Maximum Input Level | 30V/ RCA, at minimum volume |
Maximum Output Voltage | 400V RMS (1130Vp-p) |
Gain | 59 dB |
Harmonic distortion | 0.025% or less/1kHz-10kHz /When use with SR-L series |
Input Impedance | 20kΩ (RCA) |
Bias Voltage | DC 580V |
Digital InputUSB | (type B) ×1、TOSLINK Optical ×1、COAX RCA ×1 |
Analog input RCA ×1 | |
Mains voltage | AC 110V / 60Hz |
Power Consumption | 35W |
Operating temperature | 0 to 35 degrees (Celsius) (less than 90% humidity, non-condensing) |
Dimension | 7.55(W) x 2.63(H) x 10.55(D) inches, 192(W)×67(H)×268(D) mm |
Weight | 9.9 lbs / 4.5 kg |

Description

Stax introduced the NEW SRM-D50 electrostatic energiser and DAC
Electrostatic energiser/DAC for Stax Electrostatic Earspeakers
ESS ES9018 DAC coupled with ‘TI OPA1642’ ultra-low distortion op-amp to achieve bit correct signal representation
XMOS USB interface supports DSD128 playback and PCM stream with up to 384KHz sample rate
This high-performance DAC can be connected to a MAC / PC or a variety of digital audio sources
Multiple digital inputs include USB, S/PDIF on RCA and Optical.
Analog input is via RCA Analog sources can also be connected
Amplifier circuitry based on discrete components – heritage from classical
STAX amplifier product A useful VU meter is cleverly housed in the front of the display
Standard STAX 5-Pin connector for all STAX headphones
Multiple input selection
The SRM-D50 features three digital inputs: USB, S/PDIF on RCA and Optical. Analog input is via RCA.
High-resolution playback
On the digital side, the SRM-D50 uses an XMOS USB interface support for DSD 5.6MHz signal playback and PCM audio with up to 384KHz sample rate.
High-End DAC
On the digital conversion side, Stax chose to use the ESS ES9018 DAC. Renowned for its superb sound quality, the ES9018 is then fed to a ‘TI OPA1642’ ultra-low distortion op-amp to ensure the delicate bitstream remains unaltered.



Traditional Stax amplifier circuit
The SRM-D50 features an original low-noise dual FET first stage connecting to an all-stage direct-coupled Class A DC amplifier, which features no coupling capacitors. This allows for the reproduction of the smallest nuances in the music. Improvements to the emitter follower at the output stage result in an extended dynamic range, natural tonality, and inner detail.
Carefully selected components have been chosen not just for their long life and reliability but equally for their tonal quality and unmatched performance.

Exquisitely built
The entire chassis is made from Aluminium reducing the effects of magnetic interference. The SRM-D50 features a one-piece wrap around the lid. This lid goes through several processes to achieve a smooth velvet feel. The Stax logo is engraved on the top of the lid.
The SRM-D50 is a new-generation electrostatic energiser
It allows multiple source selection, including a high-resolution USB audio interface, S/PDIF and optical connection. This is coupled with a traditional analogue connection. Overall the SRM-D50 is a combination of modern aesthetic design, high-quality digital signal processing and the values of traditional Stax craftsmanship.

Additional information
Colour | Silver |
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Warranty
Backed with a 2-year Stax warranty
Delivery Info
Delivery Information
As a company our primary goal is to provide a seamless service that results in customer satisfaction. We aim to deliver within 3 working days. Unfortunately, there may be occasions where this time frame may not be met due to unforeseen circumstances; in this instance, we deliver product/s as soon as we can. All delivery charges are included within the prices quoted, unless otherwise specified.
All small items are usually delivered between 9am and 6pm, on a Monday to Friday, unless a Saturday delivery is requested. Follow My Parcel is an industry-changing innovation from DPD Local, which will give your customers unparalleled levels of information and peace of mind.Not only will your customers receive a one hour delivery timeslot, but they’ll now also be able to track the progress of their parcels on a map as our drivers make their way to the delivery addresses. Follow My Parcel will: