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STAX SR-003 mk2 Electrostatic In-Ear Headphones

The SR-003MK2 is a 5-pin PRO bias type in-the-ear earspeaker, and can be used by connecting to a driver unit having 5-pin PRO bias output socket. The redesigned ear canal type structure of the SR-003 enables you to enjoy excellent electrostatic sound quality without covering your ears. The SR-003MK2 connects to STAX driver units or adapters equipped with 5-pin type PRO bias output.

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Free 1 or 2 Day

60-Day Returns

Ships in
North America

Updated Design

SR-003mk2 has a re-designed ear piece with 3 silicone ear bud sizes. It is also 15% lighter than the S-001/MK2 which results in further resolution, transparency and purer listening pleasure.


• Type: Push-Pull electrostatic circular sound element, In-The-Earcanal type enclosure

• Ear Pads: Silicone earbuds (Small, Medium, or Large) Medium included

• Cable: parallel 6-core, 1.5m full length

1 Year Warranty

Technical Specs

Frequency Response
20-20kHz (4dB)

44pF (including cable)

110dB / 100V r.m.s. 1 kHz

Bias Voltage
550-580V DC

0.4oz without cable / 1oz with cable

Stax SR003 mmk2

About STAX

STAX produce exclusively electrostatic headphones, or “earspeakers” as they call them, in Japan, since 1938. STAX chose the electrostatic technology for its ability to produce transparent sound, and low weight for comfort/ergonomics, both due to the driver design not employing fixed magnets and moving coils, as opposed to other common headphone driver designs. The minimal weight of the driver ensures a very quick response to the signal, creating a more faithful sound reproduction.