FiiO K13 R2R Desktop DAC & Headphone Amplifier & Pre Amp

Open-Box Unit = Customs-Inspected Unit. Packaging opened by customs, item unused, complete with all accessories. \\ 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 SpecsColor: Black, SilverMain control chip (MCU): ESP32-S3USB chip: XMOS XU316DAC: Fully differential true 24-bit R2R DAC resistor arraysVolume control chip: NJW1195AR2R and LPF op-amp: OPA1642 ×4LO buffer op-amp: LTA8092 ×2Headphone amplifier: OPA1642 ×2 + TPA6120A ×2Inputs & outputsUSB input: 384kHz/32bit, DSD256Coaxial input: 192kHz/24bit, DSD64Optical input: 96kHz/24bitUSB connector: Dual Type-CDisplay & powerDisplay: Custom LCDPower input: AC 100–240V 50/60Hz; DC 12V/2.5APhysical Dimensions: ~210 × 188 × 42mm (including feet)Weight: ~980gPower 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)PerformanceFrequency response: 20Hz–80kHz, attenuation＜2.9dBSNR: ≥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 includedK13 R2RPower adapterPower cableUSB data cableHeadphone adapterQuick start guideWarranty card