STAX SR-207 Basic Open Back Headphones



  • STAX SR-207 Basic Open Back Headphones
  • STAX SR-207 Basic Open Back Headphones
  • STAX SR-207 Basic Open Back Headphones
  • STAX SR-207 Basic Open Back Headphones

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Product Details


The SR-207

The SR-207 earspeaker has employed a new sounding unit (sound element). The conventional sound element has simplest structure so that the area of film diaphragm can be used as effectively as possible compared with its external size. Taking full advantage of these conventional features, the new sound element has been packaged in a tough resin case. Thus, the sound has become cleaner and the reliability has been further improved. The thin film of a new material with very little elasticity by temperature or humidity has been adopted for the diaphragm, which has realized both the rich bass with tension and the delicate treble sound.


SR-207 (Basic) Headphone
Type :Push-pull electrostatic earspeaker
Frequency Range : 7-41,000Hz
Capacitance, including cable : 120pF
Sound Pressure Level :101dB/100V r.m.s.
Cable / color : 2.5 m, LC-OFC, low-capacitance cable / black
Earpad : High quality synthetic leather
Weight : including cable 490g
without cable 340g
Left/Right Indication L&R indicators are provided on the HEAD SPRING ARC and the left channel cable is marked with a solid line while the right channel cable is marked with a dotted line.
Operating temperature and humidity Between 0º and 35ºC, max. 90% (no condensation)
Specifications and appearance are subject to change without notice for improvement.


The SRM-252S 

The SRM-252S is an exclusive driver unit (amplifier) for driving STAX ear speakers with PRO-bias 5 pins. Its line input can directly connect to the audio output terminal of CD player, portable audio player and PC. The SRM-252S has a simple design that excels in sound quality employing the carefully selected newest high-voltage transistors and low-noise FETs. The output stage featuring the emitter-follower configuration reinforces the driving performance and also realized the smooth sound quality. Moreover, the class-A amplification throughout the stages with no coupling capacitors reproduces exhaustively the finest nuance of music. Although the SRM-252S includes a class-A DC amplifier in a compact CD jacket size case, the internal heat is effectively dissipated through the chassis of aluminum extrusion material to improve the reliability over a long period of time. Also, the parallel output terminal was added to distribute the source signal so that a loud speaker may also be simultaneously used when source equipment has only a pair of output terminals.



SRM-252S Driver unit --Export version
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
Amplification: 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)
Weight 540g
Specifications and external appearance may be changed without notice in order to improve performance.

Questions & Answers

  • Q: Hello, It says you're currently out of stock. If you do still have stock, does the SR-207 and SRM-252S come shipped together for 349.99 or is the AMP come at an extra price. Also is it possible to get the 120V adapter with the amp, thank you.
  • A: Hi Allan,the SR-207 had stop product.The SRM-252S is 415usd.You can buy STAX L500+ SRM-252S or othe Stax product.Thank you.
  • Allan 11/15/16 10:42 PM Asked.
  • Q: Hi. Do you have available this headphone-set (STAX SR-207 whit the SRM-252S ) in stock? Thanks. Fernando
  • A: Hi Fernando, Thank you for your email. Of course,the STAX SR207 with SRM252s in stock. Best regards Kerwin Shenzhenaudio
  • Fernando 10/18/16 11:27 AM Asked.
  • Q: I have a voltage of 220v in my country, this headset includes an adapter for this voltage or need a transformer?
  • A: Hi jonathan,We will ship 220V verson to you.Thank you.
  • jonathan 7/29/16 5:08 PM Asked.