STAX SR-L500 Headphone Earspeaker of Advanced-Lambda series

SKU: STAX-L500+252S
Price: US$419.98
In Stock - Shipping within 48 hours Worldwide Free Shipping
  • High-voltage transistors and low-noise FETs.
  • The internal heat is effectively dissipated.
  • An exclusive driver unit (amplifier) for driving.
  • STAX ear speakers with PRO-bias 5 pins.

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Reproduction frequency band: 7 ~ 41,000Hz
Capacitance: 110pF (including cable)
Impedance: 145kΩ / 10kHz (including cable)
Sound pressure sensitivity: 101dB / 100V r.m.s.
Polarization voltage: 580V DC
Cable: special parallel 6 core wide low capacity HiFC total cable length 2.5m
           HiFC is a registered trademark of Hitachi Metals, Ltd..
Ear pads: Luxury artificial leather
Weight: (including attached cable) 465g, about 339g (body only)
Color: Black
corresponding accessories (sold separately)
  Ear speaker stand HPS-2
  Protection cover CPC-1


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.


Customer Questions & Answers

Randy bessinger
Randy bessinger

Does this price include amp driver? Usa voltage? Shipping usa 64138?

12/16/16 8:29 PM Asked.

Hi Randy,yes,we pay the shipping fee.Thank you.

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What a pity. The price is only for the amplifier!

1/16/17 2:09 PM Asked.

Hi Q.this is Electrostatic headphones suits.Thank you.

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Hi, i am so happy i bought this Stax headset and driver setup from you. I saved 300$ buying from you, and not home in Norway. And the shipping was so fast.  Now i am listening to the best soundquality ever, and my headset dream has come true.  Now i need a good DAC, do you think the Gustard X20PRO is a good DAC together with elektrostatic Stax ?

3/20/17 11:52 PM Asked.

Hi Yngve,yes,x20pro is good Dac,it can work with Stax.Thank you.

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Hi, what does the price of $349.98 include? Thanks

7/12/17 6:21 PM Asked.

Hi Jeff,SRM-252S is $349.98.Thank you.

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