Brand record · products & long-term support

Questyle

Start with the product family. Follow documented updates, issues and support evidence across the same records.

Canonical catalog coverage13 products0 with scoped L3 records
The product family

See how the products relate.

Choose a model to open its product record.

Questyle

Bluetooth transmitter

QCC Dongle ProL2QCC Dongle Pro2L2

DAC / headphone amplifier / preamplifier

CMA Eighteen MasterL2CMA FifteenL2

In-ear monitor

NHB12L2NHB15L2

Portable DAC / headphone amplifier

M12iL2M15CL2M15iL2M18iL2M18i MaxL2SigmaL2SIGMA ProL2

Branches show product roles, not quality rankings or automatic replacements. Record levels describe evidence coverage.

First substantive responseNo comparable timing summary

Not contacted and no response remain separate states.

Resolution evidenceCheck the individual record

A manufacturer’s fix claim is separate from SPL retesting.

Overall brand ratingNo new aggregate score assigned

Existing assessments retain their dates, methods and scope.

Follow the brand

One recent event. The complete history.

Product and update views use these same event identifiers.

Follow the record

Questyle updates & issues

4 records
  1. Questyle M12iQuestyle M12i primary-source status checkpoint
    Evidence checkpointPrimary-source Verified
    Details

    Current product identity verified; functional behavior remains Awaiting SoundPath Lab test unless separately recorded

    Version / scope
    Firmware/version unknown
    Source type
    Brand official product page
    Source checked
    2026-09-07
    Read the dated source (opens in a new tab)

    A manufacturer’s fix claim is separate from an independently verified result. A dated observation does not establish a model-wide failure rate.

Show 3 earlier recordsHide history · 4 complete records
  1. Questyle M15CQuestyle M15C primary-source status checkpoint
    Evidence checkpointPrimary-source Verified
    Details

    Current product identity verified; functional behavior remains Awaiting SoundPath Lab test unless separately recorded

    Version / scope
    Firmware/version unknown
    Source type
    Brand official product page
    Source checked
    2026-09-07
    Read the dated source (opens in a new tab)

    A manufacturer’s fix claim is separate from an independently verified result. A dated observation does not establish a model-wide failure rate.

  2. Questyle M15iQuestyle M15i primary-source status checkpoint
    Evidence checkpointPrimary-source Verified
    Details

    Current product identity verified; functional behavior remains Awaiting SoundPath Lab test unless separately recorded

    Version / scope
    Firmware/version unknown
    Source type
    Brand official product page
    Source checked
    2026-09-07
    Read the dated source (opens in a new tab)

    A manufacturer’s fix claim is separate from an independently verified result. A dated observation does not establish a model-wide failure rate.

  3. Questyle M18iQuestyle M18i primary-source status checkpoint
    Evidence checkpointPrimary-source Verified
    Details

    Current product identity verified; functional behavior remains Awaiting SoundPath Lab test unless separately recorded

    Version / scope
    Firmware/version unknown
    Source type
    Brand official product page
    Source checked
    2026-09-07
    Read the dated source (opens in a new tab)

    A manufacturer’s fix claim is separate from an independently verified result. A dated observation does not establish a model-wide failure rate.

Response & verification

Follow the process

01Report
02Verify
03Respond
04Remedy
05Retest

Process illustration only. It does not imply that every step has been completed.

Brand evidence method ↗
Long-term ownership

Support after discontinuation

Normal replacement, end of support, unresolved issues and verified remedies remain distinct. A successor model does not erase an older model’s history.

Open lifecycle records →

Lifecycle & responsibility method ↗

Editorial context, existing assessments & sources

Questyle Brand Hub · Last checked 2026-08-23

Questyle products, system fit and verified limitations

Questyle focuses on current-mode headphone amplification across portable dongles and desktop systems. Match source mode, output connector and headphone load before stepping up the range.

Product families

Portable DAC / headphone amplifier

M12iPortable DAC / headphone amplifierM15CPortable DAC / headphone amplifierM15iPortable DAC / headphone amplifierM18i MaxPortable DAC / headphone amplifier

13 canonical Questyle records are searchable; 4 have complete profiles. Browse all Questyle records.

Recommended by use case

Start with system role

  • M12i: Efficient IEMs
  • M15C: Balanced portable IEM use
  • M15i: Premium portable wired listening
  • M18i Max: Portable USB and Bluetooth listening

Comparisons and guides

Connect the complete path

Known issues and firmware

Verify before buying or updating

Data status

One canonical fact source

  • 4 complete product profiles
  • 9 additional searchable records
  • Unknown support fails hard compatibility requirements
  • Commercial weight remains zero

System Builder

Use the same canonical records in a complete signal path

Only Builder-core records can enter automated recommendations. Profile-only records stay searchable until their price, connection, score and scenario regression work is complete.

Build three compatible systems

Last checked: 2026-08-23 · Canonical brand: Questyle

Evidence update · 1 September 2026

At the 1 September 2026 review, SoundPath Lab tracked 13 Questyle products, including CMA desktop systems and M/Sigma portable products. The questyle.com main domain returned an expired-site page during that check, while the Questyle-operated shop remained available. That access failure is a historical observation.

For the 14 October 2026 source review, SoundPath Lab obtained Questyle-hosted model specifications for CMA Eighteen Master, SIGMA and SIGMA Pro. CMA Eighteen Master is distinct from CMA18 Portable. SIGMA Pro adds documented analogue, optical and coaxial inputs; those inputs must not be copied to the standard SIGMA record.

On SIGMA Pro, USB recording from an analogue input sends audio to a phone, tablet or computer; it does not establish USB-host output to an external DAC. USB audio and charging use separate ports. See the USB port role guide and official SIGMA Pro connection diagram and USB recording diagram. These are source-backed distinctions, not tested compatibility results.

Portable output and desktop amplifier claims remain source-labelled until the exact hardware, load and firmware are independently verified.