Matrix Audio SU-1 — Decision Profile
L2 Decision Profile · documentation + editorial assessment
Quick verdict
Switching confirmed USB-audio hosts and DACs where isolation is a specific system requirement
Avoid if: An audio converter, USB storage hub, simultaneous dual-DAC router or proven sound-quality upgrade
Evidence checked: 2026-10-17. Manufacturer documentation; no independent SoundPath Lab listening, measurement, compatibility or firmware retest.
System conditions
Check factory mains voltage, each device’s USB compatibility and 1 A output budget; select one output and use suitable data cables
Documented specifications
| Item | Specification and conditions |
|---|---|
| Role | USB 2.0 high-speed 480 Mbit/s isolation/switching interface, not a DAC |
| Ports | Two USB-B and one USB-C inputs; two USB-A outputs, one selected at a time |
| Controls | Short press changes input; long press changes output |
| Power | Output 5 V/1 A maximum; factory mains 100–120 or 220–240 V; consumption below 15 W |
Limits and source qualifications
Host/DAC enumeration, cable reach, noise benefits and protection performance were not independently tested; claimed four-metre links do not establish every installation
Alternatives by need
GO bar Kensei actually converts USB audio to headphone output; SU-1 is an upstream digital accessory rather than its substitute
Keep or upgrade
Keep a working system that already meets these requirements. Consider a change only when the documented connection, control or system role solves a specific unmet need; no measured sound-quality upgrade is claimed.
Evidence, support and reassessment
Review scope
Exact-model primary specification and connection sections cited below were reviewed. Source claims and editorial system-fit reasoning are distinct from independent listening, measurement, compatibility or firmware tests; none were added.
Actual sound, under-load output, room/ear fit, latency and long-term reliability remain untested. Existing scores, Builder qualification and owner/test records were not reassessed.
Firmware and regional support
Local stock, authorized sales, transaction prices and long-term support duration are not established by this documentation review. Dated regional announcements apply only to their stated territory and terms. Existing dated price and owner evidence is retained.
No installed firmware version or issue resolution was retested. Follow the exact-model official support workflow.
Reassess when evidence changes
Reassess on verified hardware or firmware changes, clarification of a source conflict, material support/compatibility changes, or accepted independent testing.
No new six-month ownership evidence was added; existing owner and issue records remain unchanged.
Related records and tools
- iFi audio GO bar Kensei
- Product directory
- System Builder
- Issues and limitations
- Firmware and app tracker
- Compare this product
Sources checked
Revision: 2026-10-17 — L0/L1 to L2 after model-level documentation and decision review. Product identity and existing scores/qualification retained. L2 is evidence coverage, not independent test acceptance.
Member knowledge · editor reviewed
Questions, owner experience and product issues
Join the live member discussion below, or submit structured experience and issue reports for editorial review.
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