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Stax - International SRM-T8000 Driver unit for Earspeakers
- The SRM-T8000 is an exclusive driver unit (power amplifier) with 4-input selector developed in order to ideally drive STAX electrostatic earspeakers.
- The unit incorporates a high-quality double-axis 4-gang volume controller along with XLR connectors that can connect to all kinds of analog line-level output terminals.
- The hybrid amplifier configuration with strictly selected low-noise 6922 dual triode tube for the first stage and high-current emitter-follower at output stage brings out the maximum performance of earspeakers. Its natural un- colored sound has been realized by eliminating the coupling capacitor that affects sound
- The balanced amplifier configuration with low-noise dual triode tube eliminated transformer or inverting amplifier after the XLR balanced input terminal.
- Non-magnetic chassis construction is employed, and only the carefully selected electronic components free from aged deterioration are used taking both their sonic quality and performance into consideration.
- The SRM-T8000 is equipped with “direct mode” function, enabling it to connect to preamplifier output terminal or to use your favorite Also, two RCA inputs and XLR balanced input can bypass the incorporated volume controller (Line 4 input does not have this function).
- Optional extension slot (LINE4) is provided for future use. Refer to the instruction manual of this optional card.
- The foot rubber of the SRM-T8000 features fire-resistant ultra-hard high- grip type and vibration-proof properties. So the unit hardly slides when placed on a table etc. Please lift it up when you move it.
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Professional Reviews 90/100
Deliciously Crispy
Sound Quality
93/100
Build Quality
91/100
Features Usability
85/100
Value for Money
89/100
The SRM-T8000 brings electrostatic transparency, holographic imaging and lightning-fast transients to compatible Stax Earspeakers. AUDIOKEY REVIEWS found its natural tone, black-quiet background and authoritative bass deeply immersive, while hi-fi+ applauded its exceptionally precise midrange insight. Balanced inputs, dual PRO-bias outputs and bypass functionality complete this reference-focused hybrid energiser.
What Reviewers Are Saying
Pros
Exceptional resolution, natural midrange articulation and highly precise stereo imaging.
Expansive, three-dimensional staging with a notably quiet background and very fast transients.
Flexible analogue connectivity, including RCA and XLR inputs, two PRO-bias outputs, parallel out, mute and volume bypass.
&
Cons
Less overtly visceral and meaty than some aftermarket electrostatic energisers, particularly for rock-focused listeners.
Tube rolling is restricted by the physical clearance of the valve cans.
SOUND QUALITY PERFORMANCE 93/100
Reviewers portray the SRM-T8000 as an exceptionally transparent electrostatic energiser, combining immense imaging, natural tone and very fast transient response. Its presentation prioritises precision, openness and spatial insight; listeners seeking especially weighty, visceral impact may find alternatives more immediately forceful.
Transparency Resolution
97/100
Both reviews are emphatic about information retrieval. Hi-fi+ calls it Stax's best energiser and says it presents every scintilla of information with precise order, while AudioKey praises its exceptional transparency, clarity and articulation.
Tonal Balance Musicality
94/100
AudioKey describes midrange tone and texture as natural, refined and richly textured, with convincing soloist and choir layering. It also found the overall experience deeply engaging and musically compelling rather than merely analytical.
Dynamics
90/100
AudioKey heard explosive bass capability, effortless handling of dense musical peaks and extraordinarily quick transients. Hi-fi+ found no obvious weakness or lack of drive, but considered it less earthy, visceral and immediately dynamic than some aftermarket alternatives.
Noise Floor
94/100
AudioKey specifically highlights a black-quiet background from which music emerges clearly. The supplied reviews do not report hum, hiss or other audible noise during normal use.
Headphone Compatibility
92/100
As a PRO-bias Stax energiser, the T8000 is purpose-built for compatible electrostatic Earspeakers and provides two PRO-bias outputs. Its very high available output voltage and reviewer reports of ease on demanding musical material suggest ample authority within that intended ecosystem, rather than universal support for conventional headphones.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
91/100
AudioKey calls the unit exceptionally well executed and built to last. Hi-fi+ notes purposeful anti-vibration measures including screened and damped valves, shielded volume control, specialised feet and a large toroidal transformer on a non-magnetic aluminium chassis; tube-can clearance limits rolling options.
Features Usability
85/100
Connectivity includes two RCA inputs, one XLR input, two PRO-bias headphone outputs and parallel output, with front-panel input selection, mute and bypass functions. Balanced operation is reported to sound best, though this remains a focused analogue energiser without digital conversion, remote control or broader lifestyle features.
Value for Money
89/100
At roughly £4,395/$5,800 and with current pricing extending higher in some markets, it is a serious specialist purchase. Still, AudioKey considered its performance a fraction of the cost of former high-end two-channel systems, while hi-fi+ argued that competing energisers with comparable detail retrieval do not offer meaningful savings.
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Authorized dealers for Stax - International SRM-T8000 Driver unit for Earspeakers
- 3mA Audio — online and in-store — Houston, Texas, United States (website)
- Acoustica — online and in-store — Chester, England, United Kingdom (website)
- Ambiance Concert — in-store — Angers, Pays de la Loire, France (website)
- Analogue Seduction — online and in-store — Whittlesey, England, United Kingdom (website)
- Arctic Audio — in-store — Fargo, North Dakota, United States (website)
- ATR - Audio Trade — in-store — Eltville am Rhein, Hessen, Germany (website)
- AUDIO 2000 — in-store — Wuppertal, Nordrhein-Westfalen, Germany (website)
- Audio 46 — online and in-store — New York, New York, United States (website)
- Audio Evolution — online and in-store — Volla, Campania, Italy (website)
- AUDIO EXCLUSIVE — in-store — Wels, Oberösterreich, Austria (website)
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