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STAX SR-003 MKIIImage © STAX

STAX SR-003 MKII

61/ 100
Average
HearWiki score

Priced about right

$350
typical price, USD
Discontinuedupdated
Manufacturer pageBuy now onAmazon

At a glance

Brand
STAX
Type
Wired IEMs
Fit
-
Connection
Wired
Noise cancelling
No
Released
2012

Score breakdownaverage overall

Sound7.8
Value5.8

The HearWiki takeAI-condensed

The STAX SR-003 MKII is a compact electrostatic ear speaker designed for portable high-end listening, but it requires a dedicated amplifier to function. It delivers the signature electrostatic strengths of exceptional speed and detail, though its fit and stock accessories may not suit everyone. This is a niche, serious audiophile product rather than a conventional in-ear monitor.

What works

  • Characteristic electrostatic speed and detail
  • Very lightweight at only 12 grams
  • Open, specialized sound presentation
  • Compact design for portable use with a dedicated amp

What doesn't

  • Requires a separate electrostatic amplifier
  • Stock fit and accessories may be uncomfortable for some
  • Niche appeal with a high overall system cost

Paraphrased from published reviews & specs - not an original hands-on test. Our AI disclosure.

Specifications

Audio - STAX SR-003 MKII
Driver28 mm electrostatic
Driver typeelectrostatic
Driver size28 mm
Drivers per side1
Frequency response20 Hz - 20 kHz
Sensitivity110 dB/mW

Where to buy

Retailers we matched to this exact model. Prices are periodic snapshots - the link always opens the retailer's current listing.

What the reviews said

3 source(s) feeding this product's score.

ecoustics.com

The review positions the SR-003 MK2 as part of a premium portable electrostatic setup rather than a standalone product. It emphasizes that the combination of the SR-003 MK2 with STAX’s portable DAC/amp is expensive, but it is presented as a high-end, compact way to experience electrostatic sound.

Read the full review

rhaudioreviews.com

The reviewer presents the SR-003 MK2 as a capable electrostatic ear speaker with the usual STAX strengths: speed, detail, and a distinctive in-ear electrostatic presentation. The write-up also notes that fit and comfort are important variables, and that the stock accessories are not ideal for everyone.

Read the full review

theaudiophilecafecom.wordpress.com

This review focuses on the SR-003 MKII as a true in-ear electrostatic ear speaker with STAX’s characteristic open, specialized design. It highlights the unusual technical architecture and gives the impression of a niche but serious audiophile product rather than a conventional IEM.

Read the full review

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Where it sits in our rankings

The data-driven guides this model qualifies for.