{"product_id":"fiio-k13-r2r-desktop-dac-amp","title":"FiiO K13 R2R Desktop DAC\/Amp","description":"\u003ch1\u003e\n \u003cstrong\u003eA new way to hear your music\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n \u003c\/h1\u003e\n \u003cp\u003eThe 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. \u003cbr\u003e\u003c\/p\u003e\n \u003ch2\u003e\n \u003cstrong\u003eFully differential 24-bit R2R DAC\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cp\u003eAt 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.\u003cbr\u003e\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003eDouble the fun with Dual NOS\/OS modes\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eNOS (Non-Oversampling) Mode: Maintains the original sampling rate for decoding, preserving the authentic sound and allowing you to enjoy an organic and captivating musical experience. OS (Oversampling) Mode: Upsamples globally to a high sampling rate of 384kHz, for superior audio performance and even more refined, clear sound.\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003ePreamplifier + power amplifier output\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eWith a wide variety of inputs and outputs, this unit functions as both a preamplifier and a power amplifier, catering to various listening preferences. It also supports PCM 384kHz\/32bit and DSD256 decoding, allowing it to effortlessly process high-resolution audio signals to deliver rich sonic detail and for an outstanding listening experience.\u003c\/p\u003e\n \u003ch2\u003e\n \u003cstrong\u003e10-band high-precision PEQ\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cp\u003eFine-tune the sound to your taste. The built-in parametric EQ, powered by the XMOS XU316 chip and FIIO’s proprietary tuning algorithm, supports 10-band adjustment across all modes. Use the FIIO Control app or web interface to load presets like “Retro PEQ,” match headphone response curves, or share your own EQ curves. \u003cbr\u003e\u003c\/p\u003e\n \u003ch2\u003e\n \u003cstrong\u003eBalanced from start to finish\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cp\u003eFrom DAC to LPF to volume control and headphone amp, the entire circuit is fully differential. That means minimal distortion, excellent interference rejection, and a dynamic range that stays intact across the chain. Add gain control, headphone protection, and POP noise elimination, and you get a circuit that’s as safe as it is clean.\u003cbr\u003e\u003c\/p\u003e\n \u003ch2\u003e\n \u003cstrong\u003eSpecially-designed power supply\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h2\u003e\n \u003cul\u003e\n \u003cli\u003eDC\/AC dual supplies: The 30W internal supply is shielded for reduced interference, while an external DC input lets you experiment with higher-end linear supplies.\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eMulti-rail design: 18 low-noise LDOs and 5 DC-DC converters keep each section fed with clean power.\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eAudiophile-grade capacitors: ELNA RA3 silk-film electrolytics and specialized tantalum caps help deliver warmth and stability.\u003cbr\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch2\u003e\u003cstrong\u003ePower on tap\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eWith 2400mW+2400mW into 32Ω on the balanced outputs, the K13 R2R has the muscle to drive high-impedance headphones with ease while still being gentle enough for sensitive IEMs. It reveals detail without losing control.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003e3 gain levels + 3 independent volume curves\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eThe 3 independent gain levels and volume curves allow the K13 R2R to give you a better listening experience with various types of headphones, whether you are using sensitive earphones or harder to drive over-ear headphones.\u003c\/p\u003e\n \u003ch3\u003e\n \u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003cbr\u003e\n \u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eFully-differential 24-bit R2R DAC with 192 precision resistors\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eDual NOS and OS decoding modes\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003ePCM 384kHz\/24bit and DSD256 support\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eXLR and RCA preamp\/line outputs\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003e10-band high-precision PEQ with app and web control\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eFully balanced audio amplifier circuit with protection features\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eDC\/AC dual power supplies with shielded internal PSU and external DC input option\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eELNA RA3 audiophile-grade capacitors\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003e2400mW+2400mW balanced output into 32Ω\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eCustom HD LCD display with always-on capability\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eMinimalist aluminum design with skylight accent\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eBluetooth 5.4 with LDAC\/AAC\/SBC support\u003cbr\u003e\n \u003c\/li\u003e\n \u003cli\u003eAdjustable RGB lighting and timer shutdown\u003cbr\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cdiv\u003e\n \u003cul\u003e\n \u003cli\u003eColor: Black, Silver\u003c\/li\u003e\n \u003cli\u003eMain control chip (MCU): ESP32-S3\u003c\/li\u003e\n \u003cli\u003eUSB chip: XMOS XU316\u003c\/li\u003e\n \u003cli\u003eDAC: Fully differential true 24-bit R2R DAC resistor arrays\u003c\/li\u003e\n \u003cli\u003eVolume control chip: NJW1195A\u003c\/li\u003e\n \u003cli\u003eR2R and LPF op-amp: OPA1642 ×4\u003c\/li\u003e\n \u003cli\u003eLO buffer op-amp: LTA8092 ×2\u003c\/li\u003e\n \u003cli\u003eHeadphone amplifier: OPA1642 ×2 + TPA6120A ×2\u003c\/li\u003e\n \u003cli\u003eInputs \u0026amp; outputs\n \u003cul\u003e\n \u003cli\u003eUSB input: 384kHz\/32bit, DSD256\u003c\/li\u003e\n \u003cli\u003eCoaxial input: 192kHz\/24bit, DSD64\u003c\/li\u003e\n \u003cli\u003eOptical input: 96kHz\/24bit\u003c\/li\u003e\n \u003cli\u003eUSB connector: Dual Type-C\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eDisplay \u0026amp; power\n \u003cul\u003e\n \u003cli\u003eDisplay: Custom LCD\u003c\/li\u003e\n \u003cli\u003ePower input: AC 100–240V 50\/60Hz; DC 12V\/2.5A\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003ePhysical\n \u003cul\u003e\n \u003cli\u003eDimensions: ~210 × 188 × 42mm (including feet)\u003c\/li\u003e\n \u003cli\u003eWeight: ~980g\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003ePower output (single-ended)\n \u003cul\u003e\n \u003cli\u003eL+R ≥ 1220mW + 1220mW (32Ω, THD+N＜1%, SE, high gain)\u003c\/li\u003e\n \u003cli\u003eL+R ≥ 150mW + 150mW (300Ω, THD+N＜1%, SE, high gain)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003ePower output (balanced)\n \u003cul\u003e\n \u003cli\u003eL+R ≥ 2400mW + 2400mW (32Ω, THD+N＜1%, balanced, high gain)\u003c\/li\u003e\n \u003cli\u003eL+R ≥ 600mW + 600mW (300Ω, THD+N＜1%, balanced, high gain)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003ePerformance\n \u003cul\u003e\n \u003cli\u003eFrequency response: 20Hz–80kHz, attenuation＜2.9dB\u003c\/li\u003e\n \u003cli\u003eSNR: ≥116dB (A-weighted)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eNoise floor:\n \u003cul\u003e\n \u003cli\u003ePO ＜9uV (A-weighted)\u003c\/li\u003e\n \u003cli\u003eBAL ＜18uV (A-weighted)\u003c\/li\u003e\n \u003cli\u003ePO ＜5uV (A-weighted, M gain)\u003c\/li\u003e\n \u003cli\u003eBAL ＜8uV (A-weighted, M gain)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eOutput impedance:\n \u003cul\u003e\n \u003cli\u003ePO ＜0.7Ω (32Ω load)\u003c\/li\u003e\n \u003cli\u003eBAL ＜1Ω (32Ω load)\u003c\/li\u003e\n \u003cli\u003eTHD+N: ~0.0173% (1kHz \/ –6dB @32Ω)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n \u003cp\u003eK13 R2R\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003ePower adapter\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003ePower cable\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eUSB data cable\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eHeadphone adapter\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eQuick start guide\u003c\/p\u003e\n \u003c\/li\u003e\n \u003cli\u003e\n \u003cp\u003eWarranty card\u003c\/p\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e","brand":"FiiO","offers":[{"title":"Silver","offer_id":46866215960751,"sku":"APS-1119-2","price":319.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":46866215993519,"sku":"APS-1119-1","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/apos-audio-fiio-headphone-dac-amp-fiio-k13-r2r-desktop-dac-amp-1186818425_169c810e-2cea-44cd-a3bf-7add6df9ae50.jpg?v=1777716278","url":"https:\/\/freshized.com\/products\/fiio-k13-r2r-desktop-dac-amp","provider":"Freshized","version":"1.0","type":"link"}