{"product_id":"fiio-k9-desktop-headphone-amp-dac-standard-edition","title":"FiiO K9 Desktop Headphone Amp\/DAC - Standard Edition","description":"\u003cp\u003eThe FiiO K9 is a truly balanced desktop DAC and headphone amplifier. Two ESS ES9068AS DACs, one per channel, feed two THX AAA 788+ amplifiers that deliver up to 2,000mW per channel into 32Ω and 780mW into 300Ω from the 4.4mm and 4-pin XLR balanced outputs, with a 6.35mm output alongside. USB, optical, coaxial, analogue and LDAC Bluetooth inputs, RCA and XLR outputs for speakers or another amplifier, and a linear power supply all fit in its aluminium body. It won a CIHE EHA 2023 Silver Award and a VGP 2024 Summer Life Style award.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-hero.jpg?v=1791321178\" alt=\"FiiO K9 desktop DAC and headphone amplifier\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTwo DACs, one for each channel\u003c\/h3\u003e\n\u003cp\u003eTwo ES9068AS DACs handle the left and right channels and form the high-quality core of the K9, decoding PCM up to 768kHz\/32-bit and DSD512 over USB. Listen to your favourite playlist and be immersed straight away.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-dacs.jpg?v=1791321184\" alt=\"The two ESS ES9068AS DAC chips in the FiiO K9\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTHX AAA 788+: power for any headphone\u003c\/h3\u003e\n\u003cp\u003eThe K9’s ace up its sleeve is the THX AAA 788+ amplifier, giving an extraordinary undistorted (1% THD+N) output of up to 2,000mW per channel at 32Ω and 780mW at 300Ω from the balanced outputs. Low- or high-impedance, anything from 16Ω to 600Ω, the K9 drives your headphones with aplomb, and three gain levels match it to them: low for sensitive in-ear monitors, high for less sensitive over-ear headphones.\u003c\/p\u003e\n\u003ch3\u003eTruly balanced, from start to finish\u003c\/h3\u003e\n\u003cp\u003eFrom the DACs through the volume control to the amplifiers, every part of the K9 is truly balanced, which greatly reduces crosstalk for a more authentic sound. The desktop-grade six-stage audio circuit (I\/V conversion, OPA1612 low-pass filter, NJU72315 volume control, OPA1602 buffer amplifier, pre-amplifier and THX post-stage drive) is designed for a pure, delicate yet rich sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-balanced.jpg?v=1791321189\" alt=\"Diagram of the FiiO K9’s fully balanced audio circuit\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eClean, plentiful power\u003c\/h3\u003e\n\u003cp\u003e“Electricity is the mother of sound”, as FiiO puts it. A customised linear transformer works with four massive 4,700µF capacitors to provide clean, continuous power. The digital and analogue sections are powered separately to reduce interference, each stage of the audio circuit has its own ultra-low-noise LDO regulator, and the circuit board is partitioned to keep the power supply, signal and analogue sections fully apart, protecting the integrity of the audio signal.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-transformer.jpg?v=1791321193\" alt=\"The customised linear transformer and capacitors inside the FiiO K9\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003ePrecise clocks and a flexible USB input\u003c\/h3\u003e\n\u003cp\u003eAccurate, stable dual-mode clock management lets the K9 play high-resolution audio with great fidelity, as if you were there with the performers. The XMOS XUF208 USB receiver supports both UAC 2.0 (with a driver where your computer needs one) and plug-and-play UAC 1.0, for devices such as the PS5; switch between them in the FiiO Control app.\u003c\/p\u003e\n\u003ch3\u003eHi-res Bluetooth\u003c\/h3\u003e\n\u003cp\u003eA Qualcomm QCC5124 Bluetooth 5.1 receiver supports LDAC, aptX Adaptive, aptX HD, aptX Low Latency, aptX, AAC and SBC, so you can listen to music, watch videos and play games from your phone with high quality and low latency.\u003c\/p\u003e\n\u003ch3\u003eEvery connection you need\u003c\/h3\u003e\n\u003cp\u003eFive inputs (USB, optical, coaxial, line and Bluetooth) are chosen with the input button and shown by lights on the front. Line covers both the RCA and the 4.4mm balanced inputs; if both are connected, the 4.4mm takes priority. An output switch sets what is active:\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePO\u003c\/th\u003e\n\u003ctd\u003eFront headphone outputs (6.35mm, 4.4mm and XLR4), controlled by the volume knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePRE\u003c\/th\u003e\n\u003ctd\u003eRear RCA and XLR outputs, controlled by the volume knob: a preamp for active speakers or a power amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLO\u003c\/th\u003e\n\u003ctd\u003eRear RCA and XLR outputs at a fixed full level, to feed another amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-connections.jpg?v=1791321199\" alt=\"The inputs, outputs and indicator lights of the FiiO K9\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eHorizontal or vertical, with a weighty knob\u003c\/h3\u003e\n\u003cp\u003eThe K9 follows the well-received design language of FiiO’s other desktop units. The all-aluminium body is made with an integrated stretching and CNC process for strength and a precise finish, and with the included stand it works upright or flat, wherever it suits your desk. The iconic, weighty volume knob uses ADC curve reconstruction for 120 precise, smooth steps with minimal noise and minimal difference between the left and right channels.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-front.jpg?v=1791321205\" alt=\"The volume knob, XLR4 output and controls of the FiiO K9\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-vertical.jpg?v=1791321210\" alt=\"FiiO K9 standing upright next to a speaker\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eLights that tell you what’s playing\u003c\/h3\u003e\n\u003cp\u003eRGB lights around the knob add personality to your desk and show the sample rate (48kHz or below, above 48kHz, or DSD) and the Bluetooth codec, each in its own colour.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-rgb.jpg?v=1791321215\" alt=\"The RGB lights of the FiiO K9 with their colour key\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eMore with the FiiO Control app\u003c\/h3\u003e\n\u003cp\u003eConnect your phone over Bluetooth and the FiiO Control app adds more: digital filters, the indicator lights, channel balance (12 steps of 0.5dB either way), EQ and UAC mode. The EQ has seven preset styles and three parametric EQs you can set yourself; it works in Bluetooth mode only.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/fiio-k9-desktop-headphone-amp-dac-standard-edition-photo-app.jpg?v=1791321219\" alt=\"FiiO K9 with the FiiO Control app’s EQ on a phone\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eProtected and upgradeable\u003c\/h3\u003e\n\u003cp\u003eThree protection systems (overheating, overload and DC protection) keep the K9 and your headphones safe, so you can listen without worry. Firmware for the system and Bluetooth can be updated over USB.\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDAC, USB and Bluetooth\u003c\/th\u003e\n\u003ctd\u003e2 × ESS ES9068AS · XMOS XUF208 · Qualcomm QCC5124 (Bluetooth 5.1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAmplifier\u003c\/th\u003e\n\u003ctd\u003e2 × THX AAA 788+ · gain low, medium and high · for 16–600Ω headphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003eUSB-B (PCM 768kHz\/32-bit, DSD512) · coaxial (192kHz\/24-bit) · optical (96kHz\/24-bit) · RCA · 4.4mm balanced · Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone outputs\u003c\/th\u003e\n\u003ctd\u003e4.4mm and XLR4: 2W\/ch @ 32Ω, 780mW @ 300Ω · 6.35mm: 1.5W\/ch @ 32Ω, 200mW @ 300Ω · output impedance \u0026lt;1Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLine outputs\u003c\/th\u003e\n\u003ctd\u003eRCA 2.4Vrms · XLR 4.8Vrms (fixed or variable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePerformance\u003c\/th\u003e\n\u003ctd\u003eSNR ≥124dB (6.35mm) · THD+N \u0026lt;0.00028% · crosstalk ≥114dB (balanced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eInternal linear transformer · AC 220–240V or 100–120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize and weight\u003c\/th\u003e\n\u003ctd\u003e200 × 224.5 × 72mm (without feet) · about 2.66kg · black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFiiO’s step-up model is the \u003ca href=\"\/products\/fiio-k9-pro-desktop-headphone-amplifier-dac-ess-edition\"\u003eK9 Pro ESS\u003c\/a\u003e; for a smaller, simpler balanced DAC\/amp, the \u003ca href=\"\/products\/fiio-k7-dac-amp-standard-bluetooth-versions\"\u003eFiiO K7\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eTo connect a phone over USB, use a USB-B to USB-C cable (a computer USB cable is included).\u003c\/li\u003e\n\u003cli\u003eIn the box: K9, power cord, 6.35mm to 3.5mm adapter, USB cable, six feet pads, spare fuse, vertical stand tray, quick start guide and voltage selection card.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FiiO","offers":[{"title":"Default Title","offer_id":57116179825027,"sku":"FIIOK9-STANDARD","price":474.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/img_proxy_03959f3e-6ba2-4129-96e4-5df15fc75190.jpg?v=1767181621","url":"https:\/\/www.advancedmp3players.co.uk\/products\/fiio-k9-desktop-headphone-amp-dac-standard-edition","provider":"amp3","version":"1.0","type":"link"}