Questyle CMA Eighteen Master — Decision Profile
L2 Decision Profile · documentation + editorial assessment
Quick verdict
A desktop conversion/headphone system needing selectable line levels and analogue input
Avoid if: A universal studio-level input match, driver-free native DSD on every OS or a speaker-power amplifier
Evidence checked: 2026-10-17. Manufacturer documentation; no independent SoundPath Lab listening, measurement, compatibility or firmware retest.
System conditions
Select standard/studio and ADJ/FIX deliberately; confirm receiving input range, USB driver and headphone output wiring before raising volume
Documented specifications
| Item | Specification and conditions |
|---|---|
| Role | Desktop DAC/headphone amplifier with analogue input and preamp output |
| Digital limits | USB-C priority over USB-B; PCM 768 kHz/32-bit and native DSD512; optical/coaxial PCM 192 kHz/24-bit |
| Headphone power | SE 1.5 W/32 ohms, 188 mW/300 ohms; balanced 2 W/32 ohms, 765 mW/300 ohms; full distortion conditions absent |
| Line output | RCA 2 Vrms / XLR 4 Vrms standard; studio 14/20 dBu respectively; ADJ/FIX selection |
| Bluetooth | SBC, AAC, aptX, aptX HD and LDAC listed; not proof of every source codec |
Limits and source qualifications
Published power lacks complete frequency/THD conditions; studio gain can overload downstream inputs; actual host/codec pairing was not tested
Alternatives by need
Matrix ND-1 plus NA-1 separates conversion and amplification; SIGMA serves a portable role instead
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
- Matrix Audio ND-1
- Questyle Sigma
- 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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