Product record · R2R DAC / headphone amplifier

FiiO K11 R2R

L2 · Documented recordChoose K11 R2R when a compact desktop DAC/headphone amplifier with selectable NOS/OS R2R conversion is the actual requirement.

Compact desktop DAC/headphone amplifier using a true 24-bit resistor-ladder converter with selectable NOS and OS modes.

Updates & issues ↓Compare →Brand record →
K11 R2RR2R DAC / headphone amplifier
System role
R2R DAC / headphone amplifierConfirm the complete connection path
Documented official version
M792025-07-02
Independent test scope
No dated SPL test recordedPublished scope and limitations remain separate
Source checked
2026-09-24A source-check date is not a new device test
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Firmware & software

1 record
  1. Official firmware record · M79
    Firmware / softwarePrimary-source Verified
    Details

    Release documented; functional outcome not independently verified by this entry

    Latest official production version listed by the manufacturer at last check.

    Rollout: latest

    Version / scope
    M79
    Source type
    Brand Response
    Source checked
    2026-09-24
    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.

One record is currently documented.

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Product issues

0 records
No issue records yet.

No matching public record has been added. This is not proof that no issue or update exists.

Complete history: 1 records. Product, brand and update views use the same canonical event identifiers. Event date and source-check date remain distinct.

System role

Where it fits

A USB/S/PDIF DAC, headphone amplifier and variable/fixed line source for a desktop system.

Limits: A streamer, analogue input hub, HDMI device, phono stage or speaker amplifier.

Evidence & support

Keep the conditions visible

Its useful differences are architecture, output modes and size; R2R or NOS does not by itself prove better sound.

Full test scope, specifications & owner feedback ↓
Full specifications, test scope, existing assessments & owner feedback

SoundPath Lab · Verified product profile

FiiO K11 R2R

Compact desktop DAC/headphone amplifier using a true 24-bit resistor-ladder converter with selectable NOS and OS modes.

CategoryR2R DAC / headphone amplifierStatusCurrent / sold by official or authorized channelsReleaseCurrent generation; exact launch date not independently verifiedMarketsNorth America · Europe · Asia-Pacific; availability varies by regionPrice$150–$180 reference rangePrice checked2026-08-22

Verified data

Category-specific specifications

BrandFiiO
ModelK11 R2R
Product categoryR2R DAC / headphone amplifier
DACTrue 24-bit R2R ladder
ModesNOS and OS
Maximum decodePCM 384 kHz / DSD256
Maximum rated power1,300 mW + 1,300 mW
GainThree levels

Unknown fields are not treated as supported. Exact services, firmware behavior and regional availability can change after the checked date.

System fit

Best for / not ideal for

Best for

  • Desktop R2R experimentation
  • USB headphones and powered speakers
  • Users wanting NOS/OS choice
  • Mid-priced balanced headphone setups

Not ideal for

  • Bluetooth or network streaming
  • Portable use
  • Buyers wanting a conventional delta-sigma DAC

SoundPath verdict

What matters beyond the spec sheet

Strengths

  • Desktop R2R experimentation
  • USB headphones and powered speakers

Weaknesses

  • Bluetooth or network streaming
  • Portable use

Biggest limitation

The R2R/NOS presentation is a preference and should not be treated as universally more accurate.

Best alternative

FiiO K7 for higher-output conventional delta-sigma conversion.

Best-value use case

Desktop R2R experimentation

Knowledge graph

Reviews, comparisons, guides and risks

Reviews & explainers

No dedicated review is published yet.

Comparisons

No dedicated comparison is published yet.

Problems & risks

No model-specific issue page is published; absence of a report is not proof of no issues.

Firmware

Latest known software status

Latest known version
See official support page / tracker
Updated
Not separately verified
Last checked
2026-08-22
Notes
See the official support page and SoundPath firmware tracker before applying an update.

Purchase verification

Available channels

OfficialOfficial product / store pageglobal · checked 2026-08-22

Official channel is listed first. A missing retailer link means the exact model/region was not verified, not that the retailer never carries it.

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