{"product_id":"astell-kern-ak-hc4-portable-usb-dac-amp-open-box","title":"Astell \u0026 Kern AK HC4 Portable USB DAC\/Amp (Open Box)","description":"\u003ch2\u003e\u003cb\u003eHi-Fi Sound on the Move, AK HC4\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAstell\u0026amp;Kern offers a Hi-Fi USB DAC cable product range for a true Hi-Fi experience on smartphones and PCs.\u003c\/p\u003e\n\u003cp\u003eThe Hi-Fi sound provided by Astell\u0026amp;Kern's design, which was completed in a small size, has won praise from countless audiophiles and media.\u003c\/p\u003e\n\u003cp\u003eThe AK HC4 continues the advantages of its highly acclaimed predecessors, delivering even more perfected sound in various usage scenarios through advanced design. Featuring Dual Output, compatible with most IEMs and headphones, the AK4493S DAC for true Hi-Fi sound, and Digital Audio Remaster technology, it brings the level of Hi-Fi sound previously exclusive to Astell\u0026amp;Kern's digital audio players to the AK HC4. Enjoy Hi-Fi sound like never before.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3.5mm, 4.4mm Dual Output \u003c\/li\u003e\n\u003cli\u003eAKM AK4493S\u003c\/li\u003e\n\u003cli\u003eDAR (Digital Audio Remaster) \u003c\/li\u003e\n\u003cli\u003eSupports iOS devices\u003c\/li\u003e\n\u003cli\u003eInterchangeable Cable (Type-C \/ Lightning Cable Included)\u003c\/li\u003e\n\u003cli\u003e\nSupported UAC1.0 (For Gaming System) \n\u003c\/li\u003e\n\u003cli\u003eRoon Tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp Overview\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-8_1024x1024.png?v=1701128505\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSelection for Hi-Fi Sound – ultra-high resolution sound from AKM AK4493s DAC\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eTo achieve the highest audio quality achievable with a USB DAC, the AK HC4 is the first in the USB DAC Cable lineup to incorporate AKM's DAC. AKM's DAC has earned much love when featured in Astell\u0026amp;Kern's digital audio players, but due to the small size of USB DAC Cables and the challenges of amp design, it has been difficult to implement in the USB DAC Cable lineup until now.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe AK4493s DAC from AKM, used in the AK HC4, is further enhanced with improved noise control, lower power design, and ultra-precise amp design technology, delivering exceptionally high-quality Hi-Fi sound. Furthermore, it supports Native DSD256 and up to 32bit\/384kHz to handle any high-quality audio source, allowing you to experience the high-grade sound quality that Astell\u0026amp;Kern delivers.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp Hi-Res Sound\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-5_1024x1024.png?v=1701128533\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003ePrecision DAC and AMP Design for Hi-Fi Sound\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eIn order to gain stable output power and ultra-high-quality Hi-Fi sound through the Dual Output, AK HC4 introduces an exclusive AMP circuitry that supersedes the standard built-in DAC AMP.\u003c\/p\u003e\n\u003cp\u003eWhile maintaining a compact form factor 29.5 x 64.5x 14.5mm, we used micro resistors and capacitor parts to achieve a small footprint without compromising performance. Carefully selected ultra-small tantalum capacitors, which are used in AK player products to create a stable system and audio performance by controlling the power fluctuations, are also included to create an optimal audio circuit design. In addition, the output and audio performance are enhanced with Astell\u0026amp;Kern's unique power management technology to minimize current consumption in respect of the connected device.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp Precision DAC\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-3_1024x1024.png?v=1701128551\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003e3.5mm, 4.4mm Dual Output \u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe AK HC4 features Dual Output with both 3.5mm and 4.4mm connectors, allowing you to use AK HC4 with most Hi-Fi IEMs and headphones without the need for adapters or additional cables.\u003c\/p\u003e\n\u003cp\u003eThe 4.4mm Balanced output provides a high output of 3Vrms, maximizing the performance of sensitive headphones and IEMs, while ensuring clear channel separation and minimal noise.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe 3.5mm Unbalanced output is compatible with the majority of existing IEMs and headphones, offering a sufficient output of 2Vrms to fully experience the capabilities of your IEMs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp Dual Output\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-2_1024x1024.png?v=1701128569\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003cb\u003eDigital Audio Remaster Technology for Even More Vivid Original Sound\u003c\/b\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe AK HC4 is equipped with digital audio remaster (DAR) technology, which was only applicable to the latest digital audio players from Astell\u0026amp;Kern.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDAR technology is developed to upsample the sample rate of the sound source being played to go beyond the limits of the source format.\u003cbr\u003eThe high sample rate allows more refined play and offers delicate and analog-like original sound, helping you to enjoy the richness of the original sound, subtle differences in the nuance of the music and rich sounds at a higher level.\u003c\/p\u003e\n\u003cp\u003eIn addition, the DAR slide key on the side of the product gives you a more intuitive selection of DAR options.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e* The DAR function can be selected On\/Off depending on the sound source or your preference.\u003c\/p\u003e\n\u003cp\u003e* Supports PCM playback conversion Rate up to 384 kHz\/DSD256. \u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eDAR option\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eMaximum Conversion Rate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003e\n\u003cp\u003ePCM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e44.1kHz range PCM will be converted to 352.8kHz for playback\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e48kHz range PCM will be converted to 384kHz for playback\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eNo conversion will be made when playing DSD with this option selected\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eDSD\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eDSD files below DSD256 will be upconverted to DSD256 for playback\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003e\u003cb\u003eHigh Compatibility and Simultaneous Support for UAC 1.0 \u0026amp; 2.0 for Gaming\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eWhile modern smartphones, tablets, and PCs support UAC 2.0 connections, many gaming devices still exclusively support UAC 1.0 connections.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eTo cater to both scenarios, AK HC4 ensures compatibility by supporting both UAC 2.0 and UAC 1.0 connections for cross-platform quality sound experiences.\u003c\/p\u003e\n\u003cp\u003eConnect AK HC4 to your gaming device such as PlayStation and Switch, and enjoy low latency and enhanced sound for an immersive gaming experience.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp Nintendo Switch\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-7_1024x1024.png?v=1701128597\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eNoise-Free Rear Output Structure\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAK HC4 incorporates a rear audio output design to minimize noise.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eMost USB DAC products have the DAC positioned in the USB terminal that is connected directly to the device to process and output audio.\u003c\/p\u003e\n\u003cp\u003eHowever, with the HC4, digital signals from the device go through the dual-shielded cable to the audio circuit before being converted to an analog signal by the DAC. By processing the digital signal after, the result is superior, noise-free sound compared to other USB DAC products. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp Noise Free Output\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-1_1024x1024.png?v=1701128620\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eDual Noise Shielded Cable\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eTo ensure optimal usability across both Android and iOS devices without the need for additional adapters, AK HC4 features an interchangeable cable that readily supports Type-C and Lightning connections. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe AK HC4 features a dual shielded cable to minimize noise and deliver a more vivid, original sound.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe copper core wire is coated with tin to prevent corrosion and strengthen tensile force for enhanced durability.\u003c\/p\u003e\n\u003cp\u003eAdditionally, the entire cable is wrapped in an aluminum film to block noise with an extra layer of shielding around the power cable to further minimize noise, the biggest issue in audio, then the tin-coated copper wire is woven to minimize noise interference to sound.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFinished with a fabric jacket on top of the TPE jacket, the cable features enhanced durability and usability with perfect aesthetic appeal.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003ePrecautions When Using the Product\u003c\/b\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThis product is compatible with most Android and iOS smartphones and tablets, Windows 10\/11 and macOS products. In some cases, it may not be compatible or may be restricted depending on the hardware, software and\/or system of the device that you connect to.\u003c\/li\u003e\n\u003cli\u003eWhen connecting to a Windows PC, the driver will automatically be recognized and installed. For high-quality sound files, you are required to install a separate USB DAC driver which can be downloaded from the Support — Download section on the website.\u003c\/li\u003e\n\u003cli\u003e4-pole earphones and headphones support CTIA devices, but OMTP is not supported. \u003c\/li\u003e\n\u003cli\u003eTo play DSD and high-quality PCM sound files on a smartphone, you must install a separate free\/paid player program that supports high-resolution audio playback. (When using the default player app on a mobile device, the file will be downsampled. Please make sure to play it with a different player app.)\u003c\/li\u003e\n\u003cli\u003ePlease note that the volume will be fixed to the maximum level if you allow access with Tidal and some other apps on Android devices. \u003c\/li\u003e\n\u003cli\u003eMake sure to check the volume on your connected player device before using headphones or earphones. Some devices may automatically set the output level to maximum volume when the cable is connected. Listening to headphones or earphones at maximum volume may damage your hearing. Please verify the volume level before each use.\u003c\/li\u003e\n\u003cli\u003eDo not connect the USB-C Dual DAC Cable to an Astell\u0026amp;Kern player. When connecting the cable to a player and using it as an external DAC, the output volume will be fixed at the maximum volume setting. It is not possible to adjust the volume through the Astell\u0026amp;Kern player. Listening at maximum or a high-volume setting may cause serious damage to your hearing. Astell\u0026amp;Kern, its affiliates and agencies, cannot be held liable for any damage or injuries from negligent or inappropriate use.\u003c\/li\u003e\n\u003cli\u003eFirmware updates may be released periodically for stability improvements. For more information on firmware updates and to check if a firmware update is available, please visit the Support — Download section on the website.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cb\u003eLED for real-time indication\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAK HC4 has an LED indicator located on the front, that displays song details and USB Connection.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandby:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCM:\u003c\/strong\u003e Red\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDSD:\u003c\/strong\u003e Blue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUAC1.0:\u003c\/strong\u003e Green \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* When connected to UAC 1.0, the LED is fixed green.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Astell \u0026amp; Kern AK HC4 Portable USB DAC\/Amp with Earbuds and Phone\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/hc-6_1024x1024.png?v=1701128648\"\u003e\u003c\/p\u003e\n\n\u003ch2\u003e\nGeneral Specifications \n\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eModel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eAK HC4\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBody Color\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eMoon Silver\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBody Material \u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eAluminum\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eDAC\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eAKM AK4493S \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSample rate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ePCM : 8kHz ~ 384kHz (8\/16\/24\/32bits per Sample) \u003cbr\u003eDSD Native: DSD64(1bit 2.8MHz), Stereo \/ DSD128(1bit 5.6MHz), Stereo \/ DSD256(1bit 11.2MHz), Stereo\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eOutput Level\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUnbalanced 2Vrms \/ Balanced 3Vrms (Condition No Load)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eInput\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUSB Type-C (Supports UAC 1.0 and UAC 2.0)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eOutput\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3.5mm (Unbalanced), 4.4mm (Balanced, Only 5-pole supported)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eDimensions\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e29.5mm[W] x 64.5mm[H] x 14.5mm[D]\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eWeight\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eAbout 1.09oz (31g)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\n\u003cbr\u003eAudio Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFrequency Response\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e±±0.062dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.063dB (Condition : 20Hz~20kHz) Balanced \u003c\/p\u003e\n\u003cp\u003e±0.066dB (Condition : 20Hz~70kHz) Unbalanced │ ±0.067dB (Condition : 20Hz~70kHz) Balanced \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSignal to Noise Ratio\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e118dB @ 1kHz, Unbalanced │ 118dB @ 1kHz, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCrosstalk\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e-134dB @ 1kHz, Unbalanced │ -136dB @ 1kHz, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTHD+N\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0.0005% @ 1kHz, Unbalanced │ 0.0009% @ 1kHz, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eIMD SMPTE\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0.0005% 800Hz 10kHz (4:1) Unbalanced │ 0.0004% 800Hz 10kHz (4:1) Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eOutput Impedance\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUnbalanced Out 3.5mm (0.9ohm) │ Balanced Out 4.4mm(1.6ohm)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astell \u0026 Kern","offers":[{"title":"Default Title","offer_id":46367751110889,"sku":"AK HC4 (PEE54) [OB]","price":216.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/h-6_45bba34c-90a4-49ee-ad71-e84141a6bf70.png?v=1762466401","url":"https:\/\/audio46.mom\/products\/astell-kern-ak-hc4-portable-usb-dac-amp-open-box","provider":"Audio46 Headphone Store","version":"1.0","type":"link"}