{"product_id":"fiio-k11-r2r-dac-headphone-amplifier","title":"FiiO K11 R2R DAC \/ Headphone Amplifier","description":"\u003cp\u003eHere we have a small, neat Digital to Analogue Converter \/ Headphone Amplifier from FiiO. Ideal for a desktop system this unit is in very good condition noting a very small blemish on the screen - please refer to photographs. It is supplied in original packaging along with power supply unit, cable, USB cable, manual, and our normal three month warranty.\u003cbr\u003e\nFiiO Say….\u003cbr\u003e\nThe FiiO K11 R2R Desktop DAC \u0026amp; Headphone Amplifier is engineered to deliver exceptional audio performance, incorporating cutting-edge technology to enhance your listening experience. At its core, the K11 features a fully differential true 24-bit R2R DAC architecture.\u003cbr\u003e\nThis innovative design utilizes precision thin-film resistor arrays, totalling 192 resistors per channel, ensuring unparalleled sound accuracy. The result is a remarkably clean signal with reduced noise and distortion, allowing listeners to enjoy their music with a depth and clarity that standard DACs cannot achieve.\u003cbr\u003e\nThe K11 R2R stands out as a sophisticated solution for audiophiles seeking an immersive audio experience in a compact form.\u003cbr\u003e\nOne of the standout features of the K11 R2R is its dual operating modes: NOS (Non-Oversampling) and OS (Oversampling). In NOS mode, the amplifier maintains the original sampling rate, preserving the integrity of the audio signal and providing a natural listening experience.\u003cbr\u003e\nConversely, OS mode upsamples audio to a high sampling rate of 384kHz, enhancing clarity and detail for those who prefer a more refined sound. This versatility allows users to select the mode that best suits their audio preferences, making the K11 R2R adaptable to various listening scenarios, whether for casual enjoyment or critical listening sessions.\u003cbr\u003e\nThe K11 R2R boasts a meticulously crafted audio circuit designed for optimal performance. Audio signals are processed through a sophisticated digital audio bridge and an FPGA, ensuring precise decoding before reaching the R2R DAC. After decoding, the signals are filtered and converted to analog through high-quality op-amps, delivering both single-ended and balanced outputs.\u003cbr\u003e\nThis advanced design minimizes interference and maximizes sound quality, resulting in a richer, more dynamic audio experience. Additionally, the inclusion of a headphone protection circuit and a pop noise elimination system guarantees reliable operation, allowing you to focus solely on your music.\u003cbr\u003e\nTo support its advanced features, the K11 R2R is equipped with a specially-designed power supply that employs multiple low-noise LDO precision regulators and DC-DC converters. This comprehensive power management system ensures that the amplifier receives a clean and stable power supply, essential for high-quality audio output.\u003cbr\u003e\nWith an impressive output capability of 1300mW+1300mW under balanced modes, the K11 R2R can effortlessly drive a wide range of HiFi headphones and earphones, allowing you to fully experience the nuances of your favorite tracks without compromising on performance.\u003cbr\u003e\nThe FiiO K11 R2R is designed with user convenience in mind, featuring a high-contrast LCD screen that displays vital information such as sampling rate, volume, and gain settings at a glance. The amplifier's multi-function volume knob allows for easy control of power, volume, and menu navigation, enhancing the overall user experience.\u003cbr\u003e\nAdditionally, the adjustable RGB logo lighting provides a stylish touch, allowing you to personalize the device's appearance while also indicating the current sampling rate. This thoughtful design not only looks great on any desktop but also enhances usability for both novice and experienced users.\u003cbr\u003e\nSafety and reliability are paramount in the K11 R2R's design, featuring robust protection systems such as DC protection to prevent headphone damage from abnormal output currents. The amplifier also incorporates smart power-saving features, automatically entering low-power mode when idle to conserve energy and prevent overheating.\u003cbr\u003e\nEach K11 R2R comes with a complete package that includes a power adapter, USB data cable, headphone adapter, and a quick start guide, ensuring you have everything needed for a seamless setup. This commitment to quality and safety, combined with the amplifier's impressive performance, makes the FiiO K11 R2R an outstanding choice for anyone serious about audio.\u003cbr\u003e\nSpecifications:\u003cbr\u003e\nDAC: FIIO-developed R2R DAC, USB decoding: SA9312L\u003cbr\u003e\nMax Supported Sampling Rate 384 kHz - 32-bit\/DSD256 (USB DAC); 192 kHz - 24-bit (Coaxial); 96 kHz - 24-bit (Optical)\u003cbr\u003e\nLine Output:\u003cbr\u003e\nTHD+N \u0026amp; Noise: 0.025% (1 kHz\/0 dB @ 10 kΩ)\u003cbr\u003e\nSNR: ≥115 dB (A-weighted)\u003cbr\u003e\nCrosstalk: 111 dB\u003cbr\u003e\nNoise Floor: \u0026lt; 5.1 µV (A-weighted)\u003cbr\u003e\nFrequency Response: 20 Hz ~ 50 kHz: damping \u0026lt; 1.2 dB; 20 Hz ~ 20 kHz: damping \u0026lt; 0.2 dB\u003cbr\u003e\nDynamic Range: ≥ 107 dB\u003cbr\u003e\nLine Output Level: 2.7 Vrms\u003cbr\u003e\nHeadphone Output (6.35 mm):\u003cbr\u003e\nOutput Power: ≥ 660 mW (16Ω); 460 mW (32 Ω); 50 mW (300 Ω)\u003cbr\u003e\nTHD+N: 0.025% (1 kHz\/0 dB @ 32 Ω)\u003cbr\u003e\nSNR: ≥115 dB (A-weighted)\u003cbr\u003e\nNoise Floor: \u0026lt; 7.2 µV (A-weighted)\u003cbr\u003e\nChannel Crosstalk: ≥ 72 dB\u003cbr\u003e\nDynamic Range: ≥ 107 dB\u003cbr\u003e\nFrequency Response: 20 Hz ~ 50 kHz: damping \u0026lt; 1.3 dB; 20 Hz ~ 20 kHz: damping \u0026lt; 0.2 dB\u003cbr\u003e\nOutput Impedance: \u0026lt; 1 Ω\u003cbr\u003e\nPeak Output Voltage: 11 Vpp\u003cbr\u003e\nHeadphone Output (4.4mm):\u003cbr\u003e\nOutput Power: 520 mW (16Ω); 1300 mW (32Ω); 220 mW (300Ω)\u003cbr\u003e\nTHD+N: 0.025% (1 kHz\/- 11.6 dB @ 32 Ω)\u003cbr\u003e\nSNR: ≥ 115 dB (A-weighted)\u003cbr\u003e\nNoise Floor: \u0026lt; 14.1 µV (A-weighted)\u003cbr\u003e\nChannel Crosstalk: ≥ 107 dB\u003cbr\u003e\nDynamic Range: ≥ 107 dB\u003cbr\u003e\nFrequency Response: 20 Hz ~ 50 kHz: damping \u0026lt; 1.3 dB; 20 Hz ~ 20 kHz: damping \u0026lt; 0.2 dB\u003cbr\u003e\nOutput Impedance: \u0026lt; 1.5 Ω\u003cbr\u003e\nPeak Output Voltage: 23 Vpp\u003cbr\u003e\nPower Supply: DC 12 V\/2 A\u003cbr\u003e\nDimensions: 147 (W) x 133 (D) x 32.3 (H) mm\u003cbr\u003e\nWeight: 420 g\u003c\/p\u003e","brand":"2ndhandhifi","offers":[{"title":"Default Title","offer_id":51994992247125,"sku":"20070011995402","price":125.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/1094\/5365\/files\/IMG_1027-scaled_52c67873-11b7-4f19-b755-956cace28e07.jpg?v=1764333963","url":"https:\/\/2ndhandhifi.co.uk\/products\/fiio-k11-r2r-dac-headphone-amplifier","provider":"2ndhandhifi.co.uk","version":"1.0","type":"link"}