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The Stax SRM-D10 MKI is the world’s first compact, battery-powered portable DAC and electrostatic headphone amplifier designed to drive Stax PRO-bias earspeakers away from the desk.
This pre-owned unit is in top condition in silver and includes the original packaging.
With a precision-machined aluminium chassis, the SRM-D10 MKI delivers the high-voltage drive required by electrostatic earspeakers while remaining small enough for travel or desktop use.
Visit our Lane Cove showroom to experience the detail and spaciousness of the SRM-D10 MKI with compatible Stax headphones.
Why Choose the Stax SRM-D10 MKI Portable Headphone Amp?
The SRM-D10 MKI brings genuine electrostatic performance into a portable package for the first time.
• True Electrostatic Drive: 200 Vrms output and 580 V bias for authentic Stax sound on the move.
• High-Resolution Digital Path: ESS ES9018 and XMOS interface support PCM 384 kHz and DSD128.
• Flexible Connectivity: Micro-USB and analogue line-in cover both digital and legacy sources.
• Practical Battery Life: Approximately 4.5 hours on analogue and 3.5 hours on USB.
• Compact Build: Onl
y 450 g in a precision aluminium case.
Audition the Stax SRM-D10 MKI at our Lane Cove showroom to hear its clarity and dynamics with PRO-bias earspeakers.
Frequency response is 20 Hz – 40 kHz (+0 dB, −3 dB), harmonic distortion is ≤ 0.025 %, and gain is 53 dB.
The Texas Instruments OPA1642 op-amps and carefully engineered high-voltage circuitry keep the presentation clean and open.
Whether used as a desktop energizer or a portable companion, the SRM-D10 MKI portable amp remains a unique and highly regarded solution for Stax owners who want electrostatic performance beyond a fixed system.
Technical Specifications
• Product Type: Pre-owned
• Type: Portable electrostatic DAC and headphone energizer
• Condition: Top (silver; original packaging included)
• Compatibility: All standard 5-pin PRO-bias Stax earspeakers
• Bias Voltage: DC 580 V
• DAC: ESS Sabre ES9018
• USB Interface: XMOS
• PCM Support: Up to 384 kHz / 32-bit
• DSD Support: Up to DSD128 (5.6 MHz)
• Frequency Response: 20 Hz – 40 kHz (+0 dB, −3 dB)
• Maximum Output Voltage: 200 Vrms (100 Hz – 10 kHz)
• Gain: 53 dB (450×)
• Harmonic Distortion: ≤ 0.025 % (1 kHz – 10 kHz)
• Inputs: Micro-USB digital, 3.5 mm analogue
• Output: Standard Stax 5-pin PRO-bias connector
• Battery Life: ~4.5 h (analogue) / ~3.5 h (USB)
• Dimensions (W × H × D): 75 × 32 × 141 mm
• Weight: 450 g
• Chassis: Precision-machined aluminium
Learn more about the Stax SRM-D10 MKI in the StereoNET feature here.
Let us show you this remarkable headphone amp at Len Wallis Audio. Explore our second-hand hi-fi & AV collection here or contact our team to audition the SRM-D10 MKI at our Lane Cove showroom or enquire online.
Len Wallis Audio Excellence Promise
Since 1978, Len Wallis Audio has been a trusted name in hi-fi, curating premium audio solutions from our Lane Cove showroom in Sydney. For over four decades, we’ve selected products that deliver outstanding performance and quality.
Our focus on innovation ensures every item meets audiophile standards. Whether upgrading or building a new system, our team helps you find the ideal audio solution for your needs.
Experience the SRM-D10 MKI in person with an audition at our Lane Cove showroom. With expert guidance and a commitment to satisfaction, we make your audio journey seamless and rewarding.
Ready for portable electrostatic performance with the Stax SRM-D10 MKI Portable Headphone Amp?
Call (02) 9427 6755
Email [email protected]
Or visit us at 64 Burns Bay Road, Lane Cove, NSW, 2066
This is a buyer’s market at this level: A$1,000 sits a touch above the median A$980 and just over the 75th percentile A$1,000, so it reads as fair-to-slightly firm rather than a standout bargain. It is not overpriced, but it is also not cheap enough to call a steal given the current comparable AUD listings.
The upside is straightforward: the SRM-D10 is a compact, genuinely capable electrostatic energizer/DAC with the sort of drive and portability that make Stax rigs easy to use day to day. If it’s complete and healthy, that combination of size, convenience, and proper Stax performance is the appeal. At this price, I’d mainly want confirmation of battery health, charger, and that the input/output chain is behaving cleanly; those are the details that matter most on a transportable unit.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Stax traces its origins to 1938 in Tokyo, Japan, when Naotake Hayashi founded Showa Kouon Co., Ltd. in Chiyoda-ku. Initially focused on wax disc recording, metal master production, and audio equipment for film soundtracks, the company evolved through the postwar era. In 1950, it launched its first high-frequency condenser microphone, adopted by NHK, and renamed itself STAX Co., Ltd. in 1963, honoring its pioneering Stax-1 mic. A brief suspension in 1995 due to economic pressures gave way to revival, preserving its legacy under family leadership.
The brand specializes in electrostatic headphones, known as "EARSPEAKERS," debuting with the world-first SR-1 in 1960. This innovation spawned enduring lines like the SR series, produced for decades with incremental refinements for superior resolution and staging. Stax complements these with dedicated electrostatic amplifiers and select accessories, eschewing conventional speakers, turntables, DACs, or cables to hone its transducer expertise.
Stax commands a niche high-end position among audiophiles and professionals, revered for unmatched transparency and fidelity that rivals cost-no-object loudspeakers. Its 85-year heritage cements it as a boutique icon in electrostatic technology, far from mass-market fare, appealing to discerning buyers seeking pinnacle sonic transduction.
See all Stax listings on RADAR.
