{"product_id":"j-c-acoustics-udp-5akm","title":"J.C Acoustics UDP-5AKM AK4191+AK4499EXEQ Fully Balanced Discrete Headphone Amplifier \u0026 Preamplifier","description":"\u003cstyle\u003ebody{font-family:Arial,sans-serif;background:#f9fafc;color:#222;margin:20px}.container{max-width:940px;margin:auto;background:#fff;border-radius:12px;box-shadow:0 6px 18px rgba(0,0,0,.08);padding:28px}h2{font-size:22px;margin:18px 0 10px;color:#0b4a82}h3{font-size:18px;margin:16px 0 8px;color:#0b4a82}p{line-height:1.75;margin:8px 0}ul{margin:10px 0 16px 20px}li{margin:6px 0}.badges span{display:inline-block;background:#eef6ff;border:1px solid #d4e6ff;color:#0b4a82;padding:6px 11px;border-radius:999px;margin:5px 6px 0 0;font-size:13px}.specs{width:100%;border-collapse:collapse;margin-top:12px}.specs th,.specs td{border:1px solid #e6e6e6;padding:10px 12px;text-align:left;vertical-align:top}.specs th{background:#fafafa;width:220px}.note{font-size:13px;color:#666;margin-top:10px}\u003c\/style\u003e\u003cdiv class=\"container\"\u003e\n\u003ch2\u003eJ.C Acoustics UDP-5AKM — AK4191 + AK4499EXEQ Fully Balanced Discrete Headphone Amplifier \u0026amp; Preamplifier\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eThe UDP-5AKM pairs AKM's flagship AK4191 + AK4499EXEQ DAC chipset with a fully discrete balanced amplifier stage—delivering 16,000mW of balanced headphone power, Bluetooth 5.4, and DSD512 decoding in a single desktop unit.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eJ.C Acoustics UDP-5AKM\u003c\/strong\u003e is a flagship desktop DAC and headphone amplifier built around the \u003cstrong\u003eAK4191 + AK4499EXEQ\u003c\/strong\u003e chipset—AKM's most advanced delta-sigma DAC pairing. Driven by an \u003cstrong\u003eXMOS XU316 USB controller\u003c\/strong\u003e and a \u003cstrong\u003eQualcomm Bluetooth 5.4\u003c\/strong\u003e module supporting aptX Adaptive and LDAC, the UDP-5AKM decodes PCM up to \u003cstrong\u003e768kHz \/ 32-bit\u003c\/strong\u003e and native \u003cstrong\u003eDSD512\u003c\/strong\u003e. Its fully discrete balanced amplifier stage delivers up to \u003cstrong\u003e16,000mW per channel at 16Ω (balanced)\u003c\/strong\u003e, with a noise floor below 5μV and THD+N under 0.0003%—making it equally capable as a reference headphone amplifier and a high-output balanced preamplifier.\u003c\/p\u003e\n\u003cdiv class=\"badges\"\u003e\n\u003cspan\u003eAK4191 + AK4499EXEQ DAC\u003c\/span\u003e\u003cspan\u003eXMOS XU316 USB\u003c\/span\u003e\u003cspan\u003eBluetooth 5.4 \/ aptX Adaptive \/ LDAC\u003c\/span\u003e\u003cspan\u003e768kHz \/ 32-bit PCM\u003c\/span\u003e\u003cspan\u003eDSD512 Native\u003c\/span\u003e\u003cspan\u003e16,000mW Balanced Output\u003c\/span\u003e\u003cspan\u003eFully Discrete Amp Stage\u003c\/span\u003e\u003cspan\u003eXLR + RCA Line Out\u003c\/span\u003e\u003cspan\u003e1.5\" LCD Display\u003c\/span\u003e\u003cspan\u003eTHD+N \u0026lt;0.00030%\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAK4191 + AK4499EXEQ Flagship DAC Chipset:\u003c\/strong\u003e The UDP-5AKM uses AKM's top-tier DAC pairing—the AK4191 digital filter processor feeding the AK4499EXEQ current-output DAC—delivering exceptional linearity, ultra-low noise, and a natural, musical presentation that rivals discrete R2R designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eXMOS XU316 USB Controller:\u003c\/strong\u003e The XU316 provides a rock-solid, low-jitter USB audio interface supporting PCM up to 768kHz \/ 32-bit and native DSD512 (22.5792 MHz) over USB, with driver-free operation on macOS and Linux.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.4 — aptX Adaptive \u0026amp; LDAC:\u003c\/strong\u003e The integrated Qualcomm Bluetooth 5.4 module supports SBC, AAC, aptX, aptX LL, aptX HD, aptX Adaptive, and LDAC—enabling high-resolution wireless streaming from smartphones and tablets without sacrificing audio quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Discrete Balanced Amplifier — 16,000mW at 16Ω:\u003c\/strong\u003e The UDP-5AKM's discrete amplifier stage delivers massive headroom: up to 16,000mW per channel at 16Ω (balanced) and 850mW at 300Ω (balanced)—capable of driving the most demanding planar magnetic and dynamic headphones with authority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue Balanced XLR Line Output — 5Vrms:\u003c\/strong\u003e With a 5Vrms XLR balanced line output and 2.5Vrms RCA single-ended output, the UDP-5AKM doubles as a high-performance balanced preamplifier for active speakers or power amplifiers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.5\" LCD Display \u0026amp; Multiple Digital Inputs:\u003c\/strong\u003e A clear 1.5-inch LCD screen provides real-time input and format readout. Digital inputs include USB, Coaxial (192kHz\/24-bit), and Optical (192kHz\/24-bit), covering all common source connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"specs\"\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eDesktop DAC \u0026amp; Headphone Amplifier \/ Preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDAC Chipset\u003c\/th\u003e\n\u003ctd\u003eAK4191 + AK4499EXEQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUSB Controller\u003c\/th\u003e\n\u003ctd\u003eXMOS XU316\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBluetooth\u003c\/th\u003e\n\u003ctd\u003eQualcomm Bluetooth 5.4 — SBC \/ AAC \/ aptX \/ aptX LL \/ aptX HD \/ aptX Adaptive \/ LDAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePCM Support (USB)\u003c\/th\u003e\n\u003ctd\u003eUp to 768kHz \/ 32-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDSD Support (USB)\u003c\/th\u003e\n\u003ctd\u003eDSD64 \/ DSD128 \/ DSD256 \/ DSD512 (Native)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoaxial Input\u003c\/th\u003e\n\u003ctd\u003eUp to 192kHz \/ 24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Input\u003c\/th\u003e\n\u003ctd\u003eUp to 192kHz \/ 24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Output Power (16Ω SE)\u003c\/th\u003e\n\u003ctd\u003e4,000mW + 4,000mW (THD+N \u0026lt;1%, High Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Output Power (16Ω BAL)\u003c\/th\u003e\n\u003ctd\u003e16,000mW + 16,000mW (THD+N \u0026lt;1%, High Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Output Power (32Ω SE)\u003c\/th\u003e\n\u003ctd\u003e2,200mW + 2,200mW (THD+N \u0026lt;1%, High Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Output Power (32Ω BAL)\u003c\/th\u003e\n\u003ctd\u003e8,800mW + 8,800mW (THD+N \u0026lt;1%, High Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Output Power (300Ω SE)\u003c\/th\u003e\n\u003ctd\u003e220mW + 220mW (THD+N \u0026lt;1%, High Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphone Output Power (300Ω BAL)\u003c\/th\u003e\n\u003ctd\u003e850mW + 850mW (THD+N \u0026lt;1%, High Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Impedance\u003c\/th\u003e\n\u003ctd\u003e\u0026lt;0.10Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRCA Line Output\u003c\/th\u003e\n\u003ctd\u003e2.5Vrms (1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eXLR Line Output\u003c\/th\u003e\n\u003ctd\u003e5Vrms (1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency Response\u003c\/th\u003e\n\u003ctd\u003e20Hz – 20kHz (\u0026lt;-1dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNoise Floor\u003c\/th\u003e\n\u003ctd\u003e\u0026lt;5μV (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTHD+N\u003c\/th\u003e\n\u003ctd\u003e\u0026lt;0.00030% (1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003e1.5-inch LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e239 × 201 × 50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUnit Weight\u003c\/th\u003e\n\u003ctd\u003e~3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003e~4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp class=\"note\"\u003e⚠️ The UDP-5AKM ships without a power cable. Please ensure you have a compatible IEC power cable for your region before use. Windows users may need to install the XMOS USB audio driver for full 768kHz \/ DSD512 support.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"J.C Acoustics","offers":[{"title":"UDP-5akm+Plastic Remote control","offer_id":49146503954671,"sku":"5563324","price":899.0,"currency_code":"USD","in_stock":true},{"title":"UDP-5akm+Metal remote control","offer_id":49146504544495,"sku":"5563324","price":935.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/2004\/1455\/files\/jc-acoustics-udp-5akm-ak4191ak4499exeq-fully-balanced-discrete-headphone-amplifier-preamplifier-7613072.webp?v=1777190410","url":"https:\/\/thehificat.com\/products\/j-c-acoustics-udp-5akm","provider":"The HiFi Cat","version":"1.0","type":"link"}