FiiO K11 R2R
Desktop DAC and Headphone Amplifier
- Fully Differential 24-bit R2R DAC
- Dual Audio Modes
- True 24-bit Decoding
- Advanced Audio Circuitry
- Robust Power System
- Intuitive Control & Display
- Comprehensive Safety Features
FiiO K11 R2R
Fully Differential 24-bit R2R DAC
Engineered with precision, the K11 RAR features a self-developed, four-channel fully differential 24-bit R2R DAC using dual 48-precision thin-film resistor arrays per channel—totaling 192 resistors with 0.1% tolerance and minimal temperature drift. This design guarantees a uniquely charming sound signature that elevates your audio experience.
Superior Noise Performance
Utilizing a fully differential architecture, the K11 RAR dramatically reduces noise and minimizes unwanted FFT harmonics compared to typical designs. This results in a darker, purer musical background that lets every nuance of your audio come through with exceptional clarity.
Versatile Sound Modes
The K11 RAR offers dual NOS (Non-Oversampling) and OS (Oversampling) modes to suit your listening preferences. NOS mode preserves the original sampling rate for an authentic, organic sound, while OS mode upsamples to a high 384kHz rate for refined, crystal-clear audio performance.
True 24-bit Decoding
With support for PCM 384kHz/24bit and DSD256 decoding (with DSD256 converted via Native mode), this DAC effortlessly handles high-precision audio signals. Every subtle detail in your music is faithfully reproduced, delivering an outstanding and immersive listening experience.
Precision Volume Control
Equipped with the NJW1195A four-channel electronic volume controller and featuring three independent gain levels with dedicated volume curves, the K11 RAR adapts seamlessly to everything from delicate in-ear monitors to power-hungry over-ear headphones—ensuring precise, low-distortion adjustments for every setup.
Advanced Audio Circuitry
A specially-designed audio circuit channels the signal from a USB interface through an FPGA and the R2R DAC, followed by low-pass filtering and analog conversion via high-performance op-amps. This meticulous design—complemented by headphone protection and pop noise elimination—ensures that your audio is processed with the utmost integrity and reliability.
Robust Power Supply & Premium Components
The K11 RAR’s power system employs up to 17 low-noise LDO regulators, two DC-DC converters, and a custom 12V switching supply, providing dedicated power rails for multi-channel operation. Coupled with high-quality Beryl solid capacitors offering ultra-low ESR and excellent interference resistance, this design secures a stable, clean power supply for uncompromised audio performance.
Powerful Output Performance
Capable of delivering over 1300mW per channel under a 32惟 load in balanced mode, the K11 RAR drives HiFi earphones and headphones with ease. This robust output ensures that every intricate detail of your music is heard, pushing your audio system to its full potential.
Intuitive Display & Control
A custom high-contrast LCD screen provides at-a-glance information on sampling rate, volume, and gain, while a multi-function volume knob offers total control—powering the device on/off, navigating menus, adjusting volume, and switching between preset modes effortlessly. This design makes managing your audio settings simple and intuitive.
Elegant RGB Logo Lighting
Enhancing both form and function, the adjustable RGB-lit logo not only adds a stylish visual element but also indicates the current sampling rate. With customizable brightness, color, and patterns, it creates an elegant, uniform light show that reflects the premium nature of the K11 RAR.
Comprehensive Safety & Reliability
Built for longevity and consistent performance, the K11 RAR incorporates RCA metal pressing for secure connections, an upgraded headphone amplifier heat dissipation system, and exclusive phosphor copper shielding to guard against interference. Additional features like DC protection and smart power-saving automatically safeguard your equipment, ensuring worry-free operation.
Technical Details
Colors
Black, Silver
Dimensions
147 x 133 x 32.3 mm (including feet)
Weight
Approximately 420 g
Main Control Chip
GD32F303RET6 (single-chip microcomputer)
DAC
Fully differential true 24-bit R2R resistor arrays
Volume Control Chip
NJW1195A
USB Input
384kHz/32bit, DSD256
Coaxial Input
192kHz/24bit
Optical Input
96kHz/24bit
USB Connector
Type-C
Display
Custom LCD screen
Power Supply
DC12V 2A external adapter
SE Power Output 1
L+R ≥ 460mW + 460mW (32Ω, THD+N <1%) [32Ω/single-ended/high gain]
SE Power Output 2
L+R ≥ 50mW + 50mW (300Ω, THD+N <1%) [300Ω/single-ended/high gain]
BAL Power Output 1
L+R ≥ 1300mW + 1300mW (32Ω, THD+N <1%) [32Ω/balanced/high gain]
BAL Power Output 2
L+R ≥ 220mW + 220mW (300Ω, THD+N <1%) [300Ω/balanced/high gain]
Frequency Response
20 Hz ~ 50 kHz (attenuation <1.3 dB)
SNR
≥115 dB (A-weighted)
Noise Floor
PO < 7.2 μV (A-weighted); BAL < 14.1 μV (A-weighted)
Output Impedance
PO < 1Ω (32Ω load); BAL < 1.5Ω (32Ω load)
THD+N
LO < 0.02% (1kHz/10kΩ)
- 1x K11 R2R
- 1x Power adapter
- 1x Power cable
- 1x USB data cable
- 1x Headphone adapter
- 1x Quick start guide
- 1x Warranty card
