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[GRADE A] FIIO K11 DAC Headphone Amplifier Black
The FiiO K11 is a versatile USB DAC and headphone amplifier like its R2R version cousin the K11 R2R. On the DAC side, a CS43198 chip and GD32F303RET6 controller enable it to support high-resolution files up to PCM 32bit 384kHz and native DSD up to DSD256.
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Refurbished product - Grade A
Slightly damaged cardboard packaging.
FIIO K11 DAC CS43198 Headphone Amplifier 32bit 384kHz DSD256 Black
The FiiO K11 is a versatile USB DAC and headphone amplifier like its R2R version cousin the K11 R2R. On the DAC side, a CS43198 chip and GD32F303RET6 controller enable it to support high-resolution files up to PCM 32bit 384kHz and native DSD up to DSD256. As for the headphone amplifier stage, FiiO has equipped its K11 with a high power level; up to 520mW @32Ω on its unbalanced output and up to 1400mW @32Ω on its balanced output. This makes it compatible with a large number of headphones and earphones on the market with impedances between 16Ω and 350Ω. The FiiO K11 also incorporates a wide range of connectors, with a Toslink optical input, an SPDIF Coaxial input, an RCA stereo line output and an SPDIF Coaxial output, enabling it to be easily integrated into any Hi-Fi installation.
FiiO K11 : A high-performance DAC with volume
Thanks to its wide range of connectors, the K11 is able to accept a wide range of sources. Its asynchronous USB-C input, combined with the GD32F303RET6 controller and CS43198 DAC chip, enables it to support high-resolution files up to PCM 32bit 384kHz and native DSD up to DSD256, whether they come from your computer, smartphone, tablet or game console, for example.
FiiO K11 : Powerful amplification circuitry and low-noise power supply
As mentioned above, the K11 is capable of delivering a powerful audio signal on its headphone outputs, with 520mW @32Ω on its unbalanced 6.32mm jack output and up to 1400mW @32Ω on its balanced 4.4mm jack output. Its amplification circuitry enables it to achieve a distortion level of just 0.0009%. The entire K11 circuit is powered by a stable supply of no less than 16 low-noise LDOs.
FiiO K11 : Three adjustable gain levels
FiiO has equipped its KI11 with three separate gain levels, each with its own volume level adjustment curve. This allows you to enjoy the best listening experience whether your headphones or earphones are sensitive or difficult to control.
FiiO K11 : A refined look
The front panel of the K11 features an attractive LCD display showing information on the resolution of the file being played, the volume and gain levels, and the input source.
An enlightened logo for the FiiO K11
On the top of the K11, the FiiO logo is illuminated by various LEDs whose brightness, color and light pattern animations can be adjusted.
| FIIO K11 RGB LED SETTING PARAMETERS | |
|---|---|
| RGB-M : Status | 0: Follow audio / 1: Red / 2: Blue / 3: Cyan / 4: Violet / 5: Yellow / 6: White / 7: Green / 8: Follow cycle |
| RGB-P: Light pattern | Y: Pulse N: Constant |
| RGB-B: Brightness | 0: Off / 1, 2, 3, 4, 5: Brightness level |
FiiO K11 overview
| 1 | 6.35mm jack unbalanced headphone output |
| 2 | Balanced 4.4mm jack headphone output |
| 3 | LCD Screen |
| 4 | Multi-function knob |
| 5 | Power supply DC 12V 2A |
| 6 | USB-C input |
| 7 | Toslink optical input |
| 8 | SPDIF Coaxial input/output |
| 9 | RCA stereo line output |
Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC USB Headphone amplifier |
| DAC chip | CS43198 |
| Microcontroller | GD32F303RET6 |
| USB interface | SA9312L |
| SPDIF interface | MS8422N |
| OPA | 2x SGM8262-2 |
| Inputs | 1x USB-C 1x SPDIF Coaxial 1x Optical Toslink |
| Outputs | 1x Unbalanced 6.35mm headphone output 1x Balanced 4.4mm jack headphone output 1x RCA line output |
| Supported sample rates | USB DAC: PCM 32Bits 384kHz, DSD256 SPDIF Coaxial: 24Bits 192kHz Toslink optical: 24Bits 96kHz |
| Gain adjustment | |
| Default logo LED display | Cyan: ≤ 48KHz / Yellow: ≥ 48kHz / Green: DSD |
| 6.35MM JACK UNBALANCED HEADPHONE OUTPUT MEASUREMENT | |
|---|---|
| Ouput power | 520mW @32Ω (High gain) 60mW @300Ω (High gain) |
| Distortion rate | 0.00059% |
| Signal-to-noise ratio | 123dB |
| Frequency response | 20Hz-50kHz |
| Crosstalk | 71dB |
| 4.4MM JACK BALANCED HEADPHONE OUTPUT MEASUREMENT | |
|---|---|
| Ouput power | 1400mW @ 32Ω (High gain) 250mW @300Ω (High gain) |
| Distortion rate | 0.0010% |
| Signal-to-noise ratio | 123dB |
| Frequency response | 20Hz-50kHz |
| Crosstalk | 106dB |
| RCA LINE OUTPUT MEASUREMENT | |
|---|---|
| Output level | 1.95Vrms |
| THD+N | ＜ 0.00035% (1kHz/-0.3dB@10KΩ) |
| Signal-to-noise ratio | ≥ 126dB (A-weighted) |
| Frequency response | 20Hz-50kHz |
| Crosstalk | ≥ 120dB |
| General | |
|---|---|
| Power supply voltage | 12V DC 2A |
| Dimensions | 147 x 32 x 133mm |
| Weigth | 407g |
| Color | Black |
| Package | 1x Dac Headphone amplifier FiiO K11 1x Power adapter 1x USB-A to USB-C cable 1x 3.5mm to 6.35mm jack adapter |
| Input | SPDIF |
| Input | USB |
| Input | Optical |
| Output | Coaxial SPDIF |
| Output | Jack 4.4mm |
| Output | RCA |
| Output | Jack 6.35mm |
| DAC / ADC Chip | CS43198 |
| Max sampling rate | DSD256 |
| Max sampling rate | 384kHz |
| Color | Black |
| Class | N/A |
| Networking | No |
| Remote Control | No |
| Refurbished Grade | Grade A |
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