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  • STAX SR-009 Open Back Electrostatic Earspeakers from Japan
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STAX SR-009 Open Back Electrostatic Earspeakers from Japan

by Stax
6 customer reviews

Available from these sellers.
  • Push-Pull Open Back Circular Electrostatic Headphone
8 new from $3,480.33

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Technical Details

  • Noise-Cancelling-Feature

Product Description

The SR-009 is the product of the repeated research trip to technology and material search without deviating from our stance to return to live sound and music always with refined sensitivity.


Product Details

  • Item Weight: 3.5 ounces
  • Shipping Weight: 6.6 pounds
  • ASIN: B004W1S0BY
  • Item model number: SR-009
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (6 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: July 28, 2012

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

22 of 25 people found the following review helpful By DESMOND on August 19, 2014
Verified Purchase
I’m giving the Stax SR-009 five stars not because it’s perfect but because it’s probably the best there is, and any further improvements may be some time coming.

For reference, I also own some of the SR-009's chief competitors – Sennheiser HD-800, Audeze LCD-3 and Stax’s own SR-007A – so I hope my comments can be seen as objective. I must admit a bias toward electrostatics for their speed and transparency (I also have Stax SRX/III's and 507's), and believe the most valid comparison would be with the SR-007A because it's physically similar to the SR-009 and, on a pro-vs-con basis for sound quality, is roughly on a par with the Sennheiser and Audeze models.

The most obvious difference between the SR-009 and the SR-007A is in the mid-range, where the SR-007A’s subdued response gives them their dark and laid-back sound, which of course some will prefer. The SR-009 is more forward and neutral in this region, which also benefits the bass through greater harmonic texture. Voices are uncannily real and instruments beautifully separated. What slightly troubles me however is that the relative rise in the mid-high frequency response of the SR-009 tends to emphasise the sibilance that is also present in the SR-007A, but never really intrusive. With the SR-009, sibilance and percussive transients (including clicks and ticks) can be quite prominent. While this can add to the “wow” factor, it can also accelerate listening fatigue.

All in all, however, the SR-009 is superb. And by the way, I’m not one of those who say you need to double your investment in amplification to get good sound from these. While you do need a special driver, it can be quite simple and affordable. The SR-009 is more efficient (easier to drive) than the SR-007A.
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22 of 27 people found the following review helpful By JCG on April 13, 2014
I own(ed) several dynamic headphones (Hd800, TH900 etc) and planar magnetics (He-6, HE500 etc.) and started with the Stax line about 18 months ago. Each of the above mentioned headsets have their strengths and weaknesses (depending on genre, source, amplification etc) and it is the same with the Stax 009.

I went from a Stax 007 Mk2 and SRM-007tii amp to the 009 and a KGSSHV amp. Like other reviews out there, I agree that the 009 is superior headphone, but it needs the right amp to really shine. The 007mk2 are darker and more 'relaxed' compared to the 009 which some people criticize for 'strident trebles' or 'sibilant highs'. This is (partly) true with inferior amplification.

To hear the 009 at their best one needs so pair it with high end (read expensive) amplification. The best pairing I've heard was with a Headamp Blue Hawaii (BHSE) amplifier. Other amp options are the Eddie Current Electra, Cavalli Audio LL2 or Woo WES. (Note: As always, the source (CD or DAC) plays an important role in the chain).

I find it very good to excellent with my custom built KGSSHV -very well balanced with solid bass and an amazingly wide sound stage.

Highly recommended if you can cough up the extra $$ for a matching amplifier.
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8 of 9 people found the following review helpful By Amazon Customer on November 11, 2014
Well, I think it is pretty much a perfect headphone. Simply amazing. I cannot find any defects in the sound, at least with good amplification. They look good and they are comfortable. You simply cannot beat electrostatic technology done well, and done well it is.
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