iFi audio iDSD GR2 MT — Decision Profile
L2 Decision Profile · documentation + editorial assessment
Quick verdict
A portable USB/Bluetooth/analogue headphone and line hub when gain and output mode are verified
Avoid if: A universal headphone-drive guarantee or proof that K2HD reconstructs missing original recording information
Evidence checked: 2026-10-17. Manufacturer documentation; no independent SoundPath Lab listening, measurement, compatibility or firmware retest.
System conditions
Set input/output and initial gain before connecting headphones or a line receiver; confirm actual source format, power arrangement and Nexis platform support
Documented specifications
| Item | Specification and conditions |
|---|---|
| Identity | Master Tuned edition with Burr-Brown PCM1795 and two Steve Levine digital filters |
| Inputs | USB-C, combined optical/coaxial S/PDIF, Bluetooth 5.4, balanced 4.4 mm and single-ended 3.5 mm analogue line |
| Outputs | 4.4 mm balanced and 3.5 mm headphone outputs plus 4.4/3.5 mm analogue line outputs |
| Formats | PCM 768 kHz / DSD512 maximum claim; Bluetooth aptX Lossless/LDAC needs compatible source |
| Power boundary | Press claims over 1500 mW RMS at 32 ohms; port, distortion and frequency conditions are incomplete |
| Hybrid power | Product page prioritizes external power but may draw battery under demand; not unconditional battery bypass |
Limits and source qualifications
Load power, filters, battery cycling, codec negotiation and OTA reliability were not tested; USB Nexis functions are stated as Android-exclusive
- Broad desktop/battery-bypass wording in press material is qualified by the product page’s explicit external-first hybrid mode that can draw battery under high demand
Alternatives by need
DM15 combines CD playback with different line levels; GO bar Kensei is a simpler host-powered USB chain without the same analogue/Bluetooth hub roles
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
- FiiO DM15
- 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
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