Stax SR-009

The Ultimate Stax is out! The SR-009

In their March bulletin Stax of Japan, famous around the world round for their range of electrostatic wonder cans, announced the SR-009 system which is to be their new top-of-the-line Electrostatic headphone. And what a looker it is!

Specifications from the bulletin are as follows:


A newly developed sound element adopts in the SR-009 is a new high polymer ultra-thin film material called super engineering plastics, which is reinforced and much thinner than conventional engineered plastics.


New electrodes named MLER (Multi Layer ElectRodes) have been developed, using ultra-precision photo etch and high-tech heat diffusion.


Abundant use of precision machined light-weight aluminum


Silver plated, High purity copper wire 99.9999% (audiophile grade)


Newly designed, hand-crafted lamb leather for hours of comfort.


Newly designed 10-click slider mechanism for optimal wear and comfort. Also used in SR-507

Stax SR-009 Specifications

  • Type: Push-pull electrostatic circular sound element, open-air type enclosure
  • Frequency Response: 5-42,000Hz
  • Capacitance: 110pF (including cable)
  • Impedance 145kohm (including cable at 10kHz)
  • Sound pressure sensitivity 101dB / input 100Vr.m.s / 1kHz
  • Max sound pressure level: 118dB / 400Hz
  • Bias voltage: 580V DC
  • Earpad: Genuine leather (Lamb)
  • Cable: Silver-plated 6N (99.99999%) OFC low-capacity wide cable 2.5m
  • Weight: 596g, (454g without cable)

STAX is also introducing silver-plated extension cables to replace the current extension cables.

  • SRE-925S 2.5M
  • SRE-950S 5.0M
  • Silver-plated 6N (99.9999%) OFC parallel 6-strand, low-capacity special wide cable, 5-pin male/female

Though as always these are premium products with premium prices and for your decadent tendencies, these beauties will set you back over $5000 or $5250 to be precise for the headphone alone.

  • SR-009 Retail $5250
  • SRE-925S Retail $250
  • SRE-950S Retail $450

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