{"product_id":"fiio-k11-r2r-balanced-desktop-dac-amp-open-box","title":"FiiO K11 R2R Balanced Desktop DAC\/Amp (Open Box)","description":"\u003ch2\u003eFully differential True 24bit R2R DAC Resistor Arrays\u003c\/h2\u003e\n\u003cp\u003eFIIO's newly self-developed four-channel fully differential 24bit R2R DAC consists of 2x 48 precision thin-film resistor arrays per channel, totaling 192 resistors with 0.1% tolerance and low temperature drift (30ppm). This configuration delivers a unique and charming sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"FiiO K11 R2R Balanced Desktop DAC\/Amp Overview\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/1.1_9281bea3-ed90-4bbd-b1aa-a8b1903dcabe.png?v=1720800137\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDouble the fun Dual NOS\/OS modes\u003c\/h3\u003e\n\u003cp\u003eNOS (Non-Oversampling) Mode: Maintains the original sampling rate for decoding, preserving 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\u003ch3\u003eTrue 24bit decoding Excellent capabilities, outstanding sound quality\u003c\/h3\u003e\n\u003cp\u003eSupport for PCM 384kHz\/24bit and DSD256 decoding, means the K11 R2R can easily handle high-precision audio signals and fully exhibit the details within, providing you with an excellent audio experience. * DSD256 requires setting the DSD output mode to Native on the source device, internally converting to PCM before being decoded by the R2R resistor arrays.\u003c\/p\u003e\n\u003ch3\u003eNJW1195A High quality electronic volume control\u003c\/h3\u003e\n\u003cp\u003eThe NJW1195A is a 4-channel electronic volume controller. This resistor ladder electronic potentiometer is low distortion and low noise, allowing precise volume adjustment.\u003c\/p\u003e\n\u003ch3\u003e3 gain levels+ 3 independent volume curves\u003c\/h3\u003e\n\u003cp\u003eThe 3 independent gain levels and volume curves allow the K11 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\u003cp\u003e\u003cimg alt=\"FiiO K11 R2R Balanced Desktop DAC\/Amp Overview\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/7.1_787133cc-889c-41e4-a9c9-e90b5ee9a2a1.png?v=1720800162\"\u003e\u003c\/p\u003e\n\u003ch2\u003eDigital audio bridge: Specially-designed audio circuit\u003c\/h2\u003e\n\u003cp\u003eThe audio signal is transmitted via a USB interface processor to a digital audio bridge. After being processed by an FPGA, it is sent to the R2R DAC for 4-channel output after decoding. Then, it passes through two Ti OPA1642 op-amps for low-pass filtering and single-ended analog signal converting, and transmits to the NJW1195A electronic volume control chip for precise volume adjustment. The output stage uses two SGM8262 op-amps for 4-way phase inversion and amplification, resulting in outputs of singed-ended and balanced analog signals.\u003cbr\u003eThe audio circuit features gain controls. It is complemented by a specially-designed headphone protection circuit and a pop noise elimination system, ensuring the audio circuit is both high quality in sound produced and reliable.\u003c\/p\u003e\n\u003ch3\u003eSpecially-designed power supply\u003c\/h3\u003e\n\u003cp\u003eThe K11 R2R uses up to 17 low-noise LDO precision regulator IC and 2 DC-DC converters, providing multi-channel specialized power supply of -9V, 8V, ±7.5V, ±6V, 5.4V, 3.3V, 1.8V, and 1.2V. These are combined with an external custom 12V switching power supply to ensure the purity of the power supplied and provide a solid foundation for stronger power output.\u003c\/p\u003e\n\u003cp\u003eThe capacitors' ultra-low ESR, combined with excellent anti-interference capabilities, allow them to provide a stable and clean power supply and thus achieve high-quality sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"FiiO K11 R2R Balanced Desktop DAC\/Amp Power Supply\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/4.1_f136daad-6058-4d46-a83a-afd7b12366ce.png?v=1720800189\"\u003e\u003c\/p\u003e\n\u003ch2\u003eHigh-quality Beryl solid capacitors\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe capacitors' ultra-low ESR, combined with excellent anti-interference capabilities, allow them to provide a stable and clean power supply and thus achieve high-quality sound.\u003c\/p\u003e\n\u003ch3\u003ePowerful output: Hear every last detail\u003c\/h3\u003e\n\u003cp\u003eUnder a 320 load, the K11 R2R is capable of pushing 1300mW+1300mW under balanced modes. This allows it to easily drive many HiFi earphones and headphones to fully unlock their potential.\u003c\/p\u003e\n\u003ch3\u003eFull of clarity: A beautiful screen\u003c\/h3\u003e\n\u003cp\u003eA custom, high-contrast and durable LCD screen* allows you to easily see the sampling rate, volume, gain, or output mode with just a glance.\u003cbr\u003e*Durable LCD screen, always on with no burn-in\u003c\/p\u003e\n\u003ch3\u003eOne source of total control\u003c\/h3\u003e\n\u003cp\u003eThe K11 R2R's multi-function volume knob is used to power the device on and off, for menu operation, for volume adjustment, and for other functions. The knob is designed so that you can quickly execute various complex actions by simply pressing and turning the knob. You can also quickly switch between PO\/PRE (LO SE)\/LO* modes by double-pressing the knob, making it easier for you to appropriately connect to different audio setups.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"FiiO K11 R2R Balanced Desktop DAC\/Amp Volume Control\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/2.1_936b09d6-fc50-4733-8612-c0cf0150c7ff.png?v=1720800214\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAdjustable RGB logo lighting\u003c\/h3\u003e\n\u003cp\u003eThe FIIO logo is illuminated with RGB lighting, giving you a quick way to identify the sampling rate of the current audio being played back. Six LED strips work in conjunction with carefully placed reflective film and parts of the body designed to reflect light to make the light show uniform and elegant.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"FiiO K11 R2R Balanced Desktop DAC\/Amp RGB Lighting\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/3.1_dc211049-85a2-40a7-971d-15902437750a.png?v=1720800239\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSafe and reliable Comprehensive safety systems\u003c\/h3\u003e\n\u003cp\u003eRCA metal pressing for enhanced stability, reliable connection, and durability\u003c\/p\u003e\n\u003ch3\u003eHeadphone amplifier heat dissipation upgrade\u003c\/h3\u003e\n\u003cp\u003eA stable combination of thermal silicone gel and aluminum alloy ensures fast heat dissipation\u003c\/p\u003e\n\u003ch3\u003eExclusive phosphor copper metal shielding\u003c\/h3\u003e\n\u003cp\u003eThe shielding cover undergoes a passivation process, providing corrosion resistance and anti-oxidation capabilities. It effectively resists external interference, ensuring signals processed are accurate.\u003c\/p\u003e\n\u003ch2\u003eIN THE BOX\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eK11 R2R\u003c\/li\u003e\n\u003cli\u003ePower adapter\u003c\/li\u003e\n\u003cli\u003ePower cable\u003c\/li\u003e\n\u003cli\u003eUSB data cable\u003c\/li\u003e\n\u003cli\u003eHeadphone adapter\u003c\/li\u003e\n\u003cli\u003eQuick start guide\u003c\/li\u003e\n\u003cli\u003eWarranty card\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg alt=\"FiiO K11 R2R Balanced Desktop DAC\/Amp In The Box\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/9.1_ebbe1cd5-f970-4c55-bdb4-c6e545c97e0b.png?v=1720800304\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSPECIFICATIONS\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"1\"\u003eName\/Model\u003c\/td\u003e\n\u003ctd\u003eK11 R2R\u003c\/td\u003e\n\u003ctd\u003eHardware solution\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eSoC: GD32F303RE, DAC: FIIO-developed R2R DAC, USB decoding: SA9312L, AMP: SGM8262-2*2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"1\"\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\/Silver\/Red\u003c\/td\u003e\n\u003ctd\u003eVolume control\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eVolume knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eAbout 420g\u003c\/td\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e147x133x32.3mm (including feet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003eL\/M\/H\u003c\/td\u003e\n\u003ctd rowspan=\"2\"\u003eAdaptive impedance\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003ePO: 8~150Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDriver-free mode (switch mode)\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003ctd colspan=\"4\" rowspan=\"1\"\u003eBAL: 8~350Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOversampling setting\u003c\/td\u003e\n\u003ctd\u003eOS\/NOS\u003c\/td\u003e\n\u003ctd\u003eFIIO Control\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax supported sampling rate\u003c\/td\u003e\n\u003ctd rowspan=\"1\"\u003e384kHz-32bit\/DSD256 (USB DAC)\u003c\/td\u003e\n\u003ctd\u003eSampling rate indication\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e\nShow on display screen                                                                                                                      \u003cbr\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e192kHz-24bit (Coaxial)\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e\nLOGO indicator light shows as default: Cyan: 48KHz and below\/Yellow: above 48kHz\/Green: DSD\u003cbr\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirmware upgrade\u003c\/td\u003e\n\u003ctd\u003e96kHz-24bit (Optical)\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eSupports upgrade through USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\" rowspan=\"1\"\u003eButtons and Ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKnob\u003c\/td\u003e\n\u003ctd\u003eEncoder knob (including volume adjusting and menu confirming)\u003c\/td\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eType-C (data transmission)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle-ended line-out\u003c\/td\u003e\n\u003ctd\u003eRCA port\u003c\/td\u003e\n\u003ctd\u003eDigital optical in\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eOptical port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital coaxial in\u003c\/td\u003e\n\u003ctd\u003eRCA port\u003c\/td\u003e\n\u003ctd\u003eDigital coaxial out\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eRCA port (only works in USB mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalanced out\u003c\/td\u003e\n\u003ctd\u003eStandard 4.4mm port\u003c\/td\u003e\n\u003ctd\u003eHeadphone out\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eStandard 6.35mm port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\" rowspan=\"1\"\u003e\u003cstrong\u003ePower Supply Parameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003eDC 12V\/2A\u003c\/td\u003e\n\u003ctd\u003eBattery capacity\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eNo battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\" rowspan=\"1\"\u003e\u003cstrong\u003eAudio Parameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd colspan=\"6\"\u003eParts of performance and parameters of Line-out output (RCA, OS mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD+N \u0026amp; Noise\u003c\/td\u003e\n\u003ctd\u003eAbout 0.025% (1kHz\/0dB@10KΩ)\u003c\/td\u003e\n\u003ctd\u003eSNR\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e≥115dB (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrosstalk\u003c\/td\u003e\n\u003ctd\u003e≥111dB\u003c\/td\u003e\n\u003ctd\u003eNoise floor\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e＜5.1uV (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e20Hz~50kHz: damping＜1.2dB\u003c\/td\u003e\n\u003ctd\u003eDynamic range\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e≥107dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20Hz~20KHz: damping＜0.2dB\u003c\/td\u003e\n\u003ctd\u003eLine output level\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e2.7Vrms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\" rowspan=\"1\"\u003e\u003cstrong\u003eParts of performance and parameters of headphone output (6.35mm, OS mode)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003eL+R≥660mW +660mW(16Ω，THD+N＜1%)\u003c\/td\u003e\n\u003ctd\u003eTHD+N\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eAbout 0.025% (1kHz\/0dB@32Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL+R≥460mW +460mW(32Ω，THD+N＜1%)\u003c\/td\u003e\n\u003ctd\u003eSNR\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e≥115dB (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL+R≥50mW+50mW (300Ω，THD+N＜1%）\u003c\/td\u003e\n\u003ctd\u003eNoise floor\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e＜7.2uV (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel crosstalk\u003c\/td\u003e\n\u003ctd\u003e≥72dB\u003c\/td\u003e\n\u003ctd\u003eDynamic range\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e≥107dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e20Hz~50kHz: damping＜1.3dB\u003c\/td\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e＜1Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20Hz~20KHz: damping＜0.2dB\u003c\/td\u003e\n\u003ctd\u003ePeak output voltage\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e11Vp-p\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"7\" rowspan=\"1\"\u003e\u003cstrong\u003eParts of performance and parameters of headphone output (4.4mm, OS mode)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003eL+R≥520mW+520mW (16Ω, THD+N＜1%)\u003c\/td\u003e\n\u003ctd\u003eTHD+N\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eAbout 0.025% (1kHz\/-11.6dB@32Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL+R≥1300mW+1300mW (32Ω, THD+N＜1%)\u003c\/td\u003e\n\u003ctd\u003eSNR\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e≥115dB (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL+R≥220mW+220mW (300Ω, THD+N＜1%）\u003c\/td\u003e\n\u003ctd\u003eNoise floor\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e＜14.1uV (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel crosstalk\u003c\/td\u003e\n\u003ctd\u003e≥107dB\u003c\/td\u003e\n\u003ctd\u003eDynamic range\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e≥107dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e20Hz~50kHz: damping＜1.3dB\u003c\/td\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e＜1.5Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20Hz~20KHz: damping＜0.2dB\u003c\/td\u003e\n\u003ctd\u003ePeak output voltage\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e23Vp-p\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- --\u003e","brand":"FiiO","offers":[{"title":"Black","offer_id":47922978619625,"sku":"K11 R2R Black (OB)","price":158.39,"currency_code":"USD","in_stock":false},{"title":"Chrome","offer_id":47922978652393,"sku":"K11 R2R Silver (OB)","price":158.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/k11-r2r-black.png?v=1762467861","url":"https:\/\/audio46.mom\/products\/fiio-k11-r2r-balanced-desktop-dac-amp-open-box","provider":"Audio46 Headphone Store","version":"1.0","type":"link"}