FiiO K13 R2R True 24 bit R2R Desktop DAC and Headphone amplifier
Specs
Color: Black, Silver
Main control chip (MCU): ESP32-S3
USB chip: XMOS XU316
DAC: Fully differential true 24-bit R2R DAC resistor arrays
Volume control chip: NJW1195A
R2R and LPF op-amp: OPA1642 ×4
LO buffer op-amp: LTA8092 ×2
Headphone amplifier: OPA1642 ×2 + TPA6120A ×2
Inputs & outputs USB input: 384kHz/32bit, DSD256 Coaxial input: 192kHz/24bit, DSD64 Optical input: 96kHz/24bit USB connector: Dual Type-C
Display & power Display: Custom LCD Power input: AC 100–240V 50/60Hz; DC 12V/2.5A
Physical Dimensions: ~210 × 188 × 42mm (including feet) Weight: ~980g
Power output (single-ended) L+R ≥ 1220mW + 1220mW (32Ω, THD+N＜1%, SE, high gain) L+R ≥ 150mW + 150mW (300Ω, THD+N＜1%, SE, high gain)
Power output (balanced) L+R ≥ 2400mW + 2400mW (32Ω, THD+N＜1%, balanced, high gain) L+R ≥ 600mW + 600mW (300Ω, THD+N＜1%, balanced, high gain)
Performance Frequency response: 20Hz–80kHz, attenuation＜2.9dB SNR: ≥116dB (A-weighted)
Noise floor: PO ＜9uV (A-weighted) BAL ＜18uV (A-weighted) PO ＜5uV (A-weighted, M gain) BAL ＜8uV (A-weighted, M gain)
Output impedance: PO ＜0.7Ω (32Ω load) BAL ＜1Ω (32Ω load) THD+N: ~0.0173% (1kHz / –6dB @32Ω)
What's included
K13 R2R
Power adapter
Power cable
USB data cable
Headphone adapter
Quick start guide
Warranty card
Product highlights
Fully-differential 24-bit R2R DAC with 192 precision resistors
Dual NOS and OS decoding modes
PCM 384kHz/24bit and DSD256 support
XLR and RCA preamp/line outputs
10-band high-precision PEQ with app and web control
Fully balanced audio amplifier circuit with protection features
DC/AC dual power supplies with shielded internal PSU and external DC input option
ELNA RA3 audiophile-grade capacitors
2400mW+2400mW balanced output into 32Ω
Custom HD LCD display with always-on capability
Minimalist aluminum design with skylight accent
Bluetooth 5.4 with LDAC/AAC/SBC support
Adjustable RGB lighting and timer shutdown
A new way to hear your musicThe K13 R2R is a fully-balanced desktop DAC and headphone amplifier that leans on FIIO’s proprietary 24-bit R2R resistor arrays, a powerful 2400mW+2400mW balanced output, and a wealth of tuning and connectivity options. With dual NOS/OS modes, LDAC Bluetooth, and a precision 10-band PEQ, it gives you control over both the flavor and fidelity of your music.
Fully differential 24-bit R2R DACAt the heart of the K13 R2R are four channels of resistor arrays: 48 precision-thin film resistors per channel, 192 in total. Each resistor is matched to 0.1% accuracy with ultra-low temperature drift. The result is a true 24-bit fully differential R2R DAC that delivers a sound signature that’s rich, organic, and natural. Lower FFT harmonics mean darker backgrounds and less noise, so what you hear is only the music.