Incl. 19% VAT

Stax SRS-5100 Pro

Class A Driver Unit SRM-353X together with the SR-L500 Pro Electrostatic Headphone
0%Financing from just € 74.96 a month, with a 24-month term.
Delivery Time
1-3 business days
In stock

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The SRM-353X is the exclusive driver unit (amplifier) produced in order to drive STAX electrostatic type Earspeakers much more ideally.

Carefully selected high-quality parts of an audio grade further improved the tone quality, and re-examination of circuit details realized much wider frequency response. XLR input terminal provided enables to connect to the balanced output of audio equipment taking advantage of its superior performance.



  • Original low-noise dual FET at first stage as well as all-stage direct coupling class-A DC amplifier configuration with no coupling capacitor has realized natural tone quality with much amount of information.
  • Further improved emitter follower at output stage has enabled wide-range reproduction resulting in both the extended dynamic range at high frequency and the improved tone quality.
  • In addition to RCA input terminal, XLR balanced input terminal is provided to connect to wide range of audio equipment.
  • Custom-made 2-axis 4-gang volume controller is employed.
  • Extravagant non-magnetic aluminium alloy chassis of STAX tradition is adopted.
  • Components with little aging characteristics are selected carefully in consideration of tone quality and performance.


SR-L500 Pro

The first SR-Λ (Lambda) series was introduced 36 years ago and it has further developed into a new-generation SR-Λ with its newly designed enclosure - the new SR-L500 advanced-Lambda series Earspeaker.

Skilled technology with years of experience

Top-quality sound element
Strictly selected thin-film diaphragm as well as tough stainless fixed electrodes has also been employed for the SR-L500. Thus rich deep bass-response, delicate high-frequency and soothing mid-range have been realized in a balanced manner.

Click-type arc assembly
The arc assembly of the SR-L500 is equipped with 10-click slider mechanism for head-pad height adjustment. Once adjusted, the slider always maintains its optimal position to make its readjustment unnecessary. This enables you to enjoy hours of pleasant listening to music with optimal wear comfort.

New low-capacitance HiFC wide cable
High-performance new HiFC cable has been employed for the core wires. The whole cable uses the conventional wide parallel structure to lower the capacitance between each wire strand. This further improves the "freshness of sound".

High-quality artificial leather ear pad
The high-quality flexible artificial leather ear pad contributes not only to improve the wear feeling, but also to enhance the "freshness of sound" and "the grace of sound".

Daniel Dimitrov

We have a comprehensive selection of Stax devices available for demonstration in our HiFi and headphone studios in Berlin-Kreuzberg. We look forward to your visit!


Frequency Response: DC - 90kHz (when used with one SR-L series Earspeaker)

Rated Input Level: 100mV (at 100V Output)

Gain: 60dB

Harmonic Distortion: Max 0.01% (with one SR-L500 at 100V r.m.s./1kHz output)

Input Impedance: 50KΩ (RCA) / 50KΩ x 2 (XLR)

Input Terminal: RCA x 1 or XLR x 1 (alternative)

Max. Output Voltage: 400V r.m.s. (1kHz)

Standard Bias Voltage: DC580V

Mains Voltage: Different depending on the area

Power Consumption: 30W

Operating temperature & humidity: 0 to 35ºC / 90% max. without condensation

Dimensions: 150 (W) x 100 (H) x 360 (D) mm (protruding portion included)

Weight: 3,0 kg

Others: input-bypassing parallel output (RCA)



Type: push-pull electrostatic, oval sound element, rear open-air type enclosure

Frequency response: 7 - 41,000Hz

Electrostatic capacitance: 110pF (including attached cable)

Impedance: 145kΩ (including attached cable, at 10kHz)

Sound pressure sensitivity: 101dB / input 100Vr.m.s. / 1kHz

Maximum sound pressure level: 118dB / 400Hz

Bias voltage: 580V DC

Right/left channel indication: 'L' and 'R' indicated on the arc assembly (inside head spring), solid line (left) and dotted line (right) on the cable

Earpad: high-quality artificial leather

Cable: parallel 6-strand, 2.5m full length, low-capacity special wide HiFC cable

Weight: 465g (including attached cable), 339g (without cable)

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