{"product_id":"astell-kern-a-futura-se300-music-player-with-r-2r-dac-open-box","title":"Astell \u0026 Kern A\u0026futura SE300 Music Player with R-2R DAC (Open Box) - Discontinued","description":"\u003ch2\u003eThe Future of Analog Sound, SE300\u003c\/h2\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 The Future of Analog Sound\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/se300-2.jpg?v=1692045757\"\u003e\u003c\/p\u003e\n\u003cp\u003eA\u0026amp;futura from Astell\u0026amp;Kern is a product line that represents Astell\u0026amp;Kern’s ceaseless efforts for innovation. SE300, the fourth model in the A\u0026amp;futura range is a premium digital audio player that inherits this identity and expands the scope of sound with an entirely new implemented technology.\u003c\/p\u003e\n\u003cp\u003eA\u0026amp;futura SE300 is equipped with an ultra-refined R-2R DAC, Class A\/AB dual amps born with our proprietary TERATON ALPHA technology, and for the first time a self-developed FPGA optimized technology. With these unrivaled components, it offers the true sound philosophy and technology of Astell\u0026amp;Kern.\u003c\/p\u003e\n\u003cp\u003eImmerse yourself into the true analog sound that the SE300 produces with Class-A AMP and R-2R DAC technologies, for the first time in an Astell\u0026amp;Kern player.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFully Discrete 24 bit R-2R DAC\u003c\/li\u003e\n\u003cli\u003eEquipped with 96 ultra-precision 0.01% \u0026amp; TCR10 resistors\u003c\/li\u003e\n\u003cli\u003eNew Dual AMP (Class A\/AB) mode\u003c\/li\u003e\n\u003cli\u003eOption for OS \/ NOS modes\u003c\/li\u003e\n\u003cli\u003eImplemented self-developed and optimized FPGA technology\u003c\/li\u003e\n\u003cli\u003eNew Crimson theme UI\/UX\u003c\/li\u003e\n\u003cli\u003eSupports Bluetooth 5.0 and wireless Hi-Fi aptX™ HD, LDAC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 Overview\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/se300-1.jpg?v=1692046031\"\u003e\u003c\/p\u003e\n\u003ch2\u003eFully Discrete 24bit R-2R DAC\u003c\/h2\u003e\n\u003cp\u003eTo ensure the A\u0026amp;futura SE300 audio player better reproduces analog sounds, we set out to combine the DAC and AMP sections for the first time during the initial design phase.\u003c\/p\u003e\n\u003cp\u003eThe SE300 comes supplied with an R-2R DAC, instead of a Delta-Sigma DAC that is most commonly used in other audio players. R-2R DAC, also known as Ladder DAC, as it arranges resistors in a ladder form, offers natural yet dynamic Hi-Fi sounds, but it is extremely technical and difficult to execute as it requires complex refined resistor units and hard to manage current controls. However, despite these technical challenges, after several years for development and a lot of trial and error we have managed to overcome this and create a new analog sound. In the process, we have meticulously selected each and every one of the 96 ultra-precision resistors and finalized our R-2R DAC technology.\u003c\/p\u003e\n\u003cp\u003eSE300 takes us one step closer to realizing analog sound from a digital source and is the result of a long journey taken by Astell\u0026amp;Kern with uncompromising craftsmanship to find the ultimate sound solution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRealization of 24-bit Decoding with R-2R DAC\u003c\/strong\u003e \u003cbr\u003eThe R-2R DAC within the SE300 arranges 48 pairs (23xR and 25x2R) of 96 ultra-precision resistors to create analog signals, in turn realizing true Hi-Fi 24-bit decoding.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-precision resistor Design, the Key to Hi-Fi Sound\u003c\/strong\u003e \u003cbr\u003eIt is key to total the accurate current value with resistors that has the smallest error ranges in order to create Hi-Fi sound with an R-2R DAC. To realize this, Astell\u0026amp;Kern inspected each specifically selected ultra-precision resistor of 0.01% error range to complete the design of SE300.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-precision TCR10 Specifications\u003c\/strong\u003e \u003cbr\u003eTo create Hi-Fi sound without distortions within such an extreme precision design, we analyzed and preconceived any potential impacts that may be caused by changes in temperature. The SE300 comes with special *TCR10 specifications to minimize the changes in the 0.01% resistor error range.\u003c\/p\u003e\n\u003cp\u003e* TCR10: 10 ppm\/℃ Low Temperature Coefficient of resistor\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 R2R DAC\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/20230503141902_334e96d3-235d-4c4e-8114-ba9ebfd66d59.png?v=1692045791\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSupporting Class A\/AB Dual AMP Mode\u003c\/h2\u003e\n\u003cp\u003eThe SE300 comes with a Dual AMP mode. Class A amplification that creates low distortions and natural sounds and a Class AB amplification that plays dynamic sounds with high efficiency so users can pick and choose from the two amps according to their listening preferences and genre of music that they are playing.\u003c\/p\u003e\n\u003cp\u003eExperience the true sounds that only Astell\u0026amp;Kern can deliver with the SE300 that comes with an R-2R DAC and Class A\/AB Dual AMPs born from Astell\u0026amp;Kern’s unique proprietary designs that reduces power consumption whilst enhancing output and removing noise.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClass A AMP mode\u003cbr\u003e\u003c\/strong\u003eClass A AMP is an analog amp that offers the best linear output, amplifying signals without distortion or loss of signal and providing soft, warm, and natural sounds. The refined analog signal created directly by the R-2R DAC, reproduces a sound closest to the original analog audio through the organic and powerful Class A AMP.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClass AB AMP Mode\u003cbr\u003e\u003c\/strong\u003eClass AB AMP is an analog amp that offers a powerful output with the added benefit of high efficiency. This presents dynamic and crisp sounds with less harmonic distortion.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 Amp Circuit\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/20230503141921_60885bc0-c1e7-4f22-8358-18420025d769.png?v=1692045821\"\u003e\u003c\/p\u003e\n\u003ch2\u003e2-Step Gain Mode for the Perfect Hi-Fi Experience\u003c\/h2\u003e\n\u003cp\u003eFor seamless use of sensitive IEMs and hard to drive headphones, a device must provide suitable output, respective of the connected device’s specification.\u003c\/p\u003e\n\u003cp\u003eThe SE300 supports a 2-step Gain Level mode to create the prefect match for a wide range of headphones and IEMs, maintaining an optimal sound output. The two-step gain setting with \"Normal\" and \"High Gain\" modes can generate a high current output to create a powerful sound and excellent driver control.\u003c\/p\u003e\n\u003cp\u003eWith up to 6 Vrms from the balanced connections, driving high-impedance headphones has never been easier.\u003c\/p\u003e\n\u003cp\u003eOutput Level\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNormal Gain: Unbalanced 2Vrms, Balanced 4Vrms\u003c\/li\u003e\n\u003cli\u003eHigh Gain: Unbalanced 3Vrms, Balanced 6Vrms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* Based on condition no load, there may be differences depending on the measurement method.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 Two Step Mode\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/20230503141907_fd87209b-8afe-454f-9372-a33bc96050f5.png?v=1692045842\"\u003e\u003c\/p\u003e\n\u003ch2\u003eTERATON ALPHA, The Essence of A\u0026amp;K Audio Technologies\u003c\/h2\u003e\n\u003cp\u003eIt would not have been possible to combine the exquisitely designed R-2R DAC with ultra-precision resistors and Class A AMP, which was considered impossible to miniaturize, without the innovative audio technology of TERATON ALPHA. SE300 is an innovative audio player that is applied with current and temperature control of TERATON ALPHA technology and an optimized FPGA design.\u003c\/p\u003e\n\u003cp\u003eTERATON ALPHA, engineered through endless research, is Astell\u0026amp;Kern's unique technology that has been designed to produce audio playback that is as close to the original sound through effective power noise removal, efficient power management and unwavering amplification, and a fully converted audio output interface.\u003c\/p\u003e\n\u003cp\u003eCircuit structures of R2R DAC and Dual A\/AB AMP that are applied for the first time in the SE300 is completed with the sound solution of TERATON ALPHA, creating the purest form of sounds and music.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eSupporting Optimized FPGA OS \/ NOS Modes\u003c\/h2\u003e\n\u003cp\u003eThe SE300 comes with Astell\u0026amp;Kern’s exclusively developed FPGA and provides optimized OS \/ NOS modes.\u003c\/p\u003e\n\u003cp\u003eThe SE300 uses an FPGA (Field Programmable Gate Array) that we self developed for optimized design instead of using common off the shelf commercial semiconductor chipsets, relaying digital signals to the R-2R DAC through its algorithm. Astell\u0026amp;Kern’s FPGA, developed specifically for the SE300, supports the most ideal OS (Over Sampling) \/ NOS (Non-Over Sampling).\u003c\/p\u003e\n\u003cp\u003eEnjoy the sound styles reproduced by NOS and OS modes, meticulously designed for the SE300's hardware and programs.\u003c\/p\u003e\n\u003cstrong\u003eNOS (Non-Over Sampling) Mode\u003c\/strong\u003e\n\u003cp\u003eIn NOS mode, the player reproduces the pure original sound without any digital processing, allowing users to enjoy the true unprocessed sounds decoded by the R-2R DAC itself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOS (Over Sampling) Mode\u003cbr\u003e\u003c\/strong\u003eOS mode offers partial digital processing that expands the bandwidth of the original signal to offer impressive details, with an expansive sense of space creating crisp and clear sounds.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 25%;\"\u003e\u003cstrong\u003eOS Option\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 25%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eMaximum Conversion Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 25%;\"\u003ePCM\u003c\/td\u003e\n\u003ctd style=\"width: 25%;\"\u003eOS Mode\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eSupports up to 8x conversion \u003cbr\u003e44.1kHz range PCM will be converted to 352.8kHz for playback \u003cbr\u003e48kHz range PCM will be converted to 384kHz for playback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 25%;\"\u003ePCM\u003c\/td\u003e\n\u003ctd style=\"width: 25%;\"\u003eNOS Mode\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eBYPASS (ex. 44.1kHz =\u0026gt; 44.1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 25%;\"\u003eDSD\u003c\/td\u003e\n\u003ctd style=\"width: 25%;\"\u003eOS\/NOS Mode\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eSupports up to DSD 256 for playback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 NOS modes\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/20230503141911_b9dea680-6f16-4179-acde-85c04f8fb6c0.png?v=1692045886\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eNew Experience, New User Interface\u003c\/h2\u003e\n\u003cp\u003eThe SE300 comes with a redesigned Crimson-themed UI\/UX transforming into a \"true music player\" for users to deeply connect with their music listening experience.\u003c\/p\u003e\n\u003cp\u003eThe new UI\/UX is designed so that users can quickly browse music categories and re-discover songs within their music library. We also added an easy album art search function so that users can re-discover the joy of viewing and interacting with music album art whilst listening to their music.\u003c\/p\u003e\n\u003cp\u003eThe crimson theme focuses on edge, simplicity, and dark mode keywords. The color theme of black with red highlights lowers visual fatigue and offers intuitive user experiences, and many other improvements were made to the device’s user-friendliness of app service, artist view, album sorting, and the album art search function. Immerse yourself in music with the new UI\/UX.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 User Interface\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/20230503141909_1e92c620-10fc-4dba-97f6-5fac8de72a12.png?v=1692045908\"\u003e\u003c\/p\u003e\n\u003ch2\u003eReal-Time Information Confirmed by Light\u003c\/h2\u003e\n\u003cp\u003eBehind the exquisite A\u0026amp;futura SE300 volume wheel is an LED light that is reminiscent of rising waves. With the LED light that radiates from the inside of the SE300, users can check the Bit Depth information of the currently playing music or the current AMP mode.\u003c\/p\u003e\n\u003cp\u003e* The LED can be turned on or off according to the user’s preference.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRED 16bit\u003c\/li\u003e\n\u003cli\u003eGREEN 24bit\u003c\/li\u003e\n\u003cli\u003eBLUE 32bit\u003c\/li\u003e\n\u003cli\u003eVIOLET DSD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 LEDs\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/20230403105902_f8fc3878-0013-40f7-95b3-959a371989bd.png2.png?v=1691786339\"\u003e\u003c\/p\u003e\n\u003ch2\u003eOther features\u003c\/h2\u003e\n\u003ch4\u003eAdoption of 5.46 inch Full HD Display\u003c\/h4\u003e\n\u003cp\u003eExperience the SE300 more vividly and comfortably with a wide 5.46-inch, large-screen Full HD display.\u003c\/p\u003e\n\u003ch4\u003eSupports Native DSD256, 32bit\/384kHz\u003c\/h4\u003e\n\u003cp\u003eSE300 supports DSD256 and up to 32bit\/384kHz with Astell\u0026amp;Kern’s unrivalled audio technology, allowing you to fully enjoy your favorite music anywhere you like.\u003c\/p\u003e\n\u003ch4\u003eReplayGain Automatically and Uniformly Adjusts Playback Volume\u003c\/h4\u003e\n\u003cp\u003eReplayGain, which adjusts sound sources with different volumes to an identical level, has been incorporated. Now, enjoy your own playlists seamlessly through the ReplayGain feature on SE300. * ReplayGain supports up to 24-bit\/192 kHz sound sources.\u003c\/p\u003e\n\u003ch4\u003eAK File Drop to enjoy wireless transfers\u003c\/h4\u003e\n\u003cp\u003eThe new AK File Drop function in the SE300 makes file transfers easier and more convenient. Using AK File Drop, you can freely transfer files wirelessly through a PC, smartphone, or FTP program located on the same network. Music file management is now possible with a cableless, wireless solution.\u003c\/p\u003e\n\u003ch4\u003eWireless Hi-Fi Sound Through BT Sink\u003c\/h4\u003e\n\u003cp\u003eBT Sink function connects the SE300 to an external device via Bluetooth, similar to connecting a smartphone with a BT speaker. Music from an external device, such as a smartphone can now be played back in high-quality on the SE300 using the BT Sink function.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 Supported Modes\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/sr35-10.png?v=1691784752\"\u003e\u003c\/p\u003e\n\u003ch2\u003eDESIGN\u003c\/h2\u003e\n\u003cp\u003eThe design concept for the A\u0026amp;futura SE300 is 'Stream'. Like small ripples on water turning into crashing waves, we designed the SE300 with Class A AMP, the ultimate AMP form, to have a unique identity.\u003c\/p\u003e\n\u003cp\u003eThe main body made from aluminum has streamlined surfaces that represent the flow of music. Through this, we create a firm yet flexible image. We added intensity by using contrasting materials such as stainless steel and glass to further enhance the theme of 'Stream'. In addition to this, the bottom section of the device curves outward, allowing for a more ergonomic grip whilst using the player.\u003c\/p\u003e\n\u003cp\u003eThe right side of the SE300 is coated with stainless steel to enhance visual focus. The polished side and triangular-patterned volume wheel are key to creating powerful and visually striking contrasts. The straight pattern on the rear of the volume wheel elevates the visual density and allows users to control volume and visually check the changes. The wheel lighting is placed behind the volume wheel to avoid direct exposure whilst allowing the light to be reflected on the side decorations and volume wheel knurl, creating the effect of light bursting from the inside.\u003c\/p\u003e\n\u003cp\u003eThe rear glass also features a new etching pattern, continuing the concept of 'Stream' The basic pattern features the A logo of Astell\u0026amp;Kern, designed to present an overall flow of stream with differences in size. This etching pattern amplifies the sense of flow with the differences in inclinations, adding a sense of depth to the rectangular rear glass that may otherwise look dull.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"center\" alt=\"Astell \u0026amp; Kern A\u0026amp;futura SE300 Design\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/se300-3.jpg?v=1692046007\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003ch3\u003eGeneral Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel\u003c\/strong\u003e\n\u003cp\u003eSE300\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Color\u003c\/strong\u003e\n\u003cp\u003ePlatinum Silver\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e\n\u003cp\u003eAluminum and Stainless Steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay\u003c\/strong\u003e\n\u003cp\u003e5.46inch HD 1080 x 1920 touch screen\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Audio Formats\u003c\/strong\u003e\n\u003cp\u003eWAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample rate\u003c\/strong\u003e\n\u003cp\u003ePCM : 8kHz ~ 384kHz (8\/16\/24\/32bits per Sample) \u003cbr\u003eDSD : DSD64(1bit 2.8MHz), Stereo \/ DSD128(1bit 5.6MHz), Stereo \/ DSD256(1bit 11.2MHz), Stereo\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Level\u003c\/strong\u003e\n\u003cp\u003e[Normal] Unbalanced 2Vrms │ Balanced 4Vrms (Condition No Load) \u003cbr\u003e[High] Unbalanced 3Vrms │ Balanced 6Vrms (Condition No Load)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCPU\u003c\/strong\u003e\n\u003cp\u003eQuad-core\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC\u003c\/strong\u003e\n\u003cp\u003eFull Discrete R-2R\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecoding\u003c\/strong\u003e\n\u003cp\u003eSupport up to 32bit \/ 384kHz playback\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput\u003c\/strong\u003e\n\u003cp\u003eUSB Type-C input (for charging \u0026amp; PC \u0026amp; MAC)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs\u003c\/strong\u003e\n\u003cp\u003eUnbalanced Out (3.5mm), Optical Out(3.5mm) \u003cbr\u003eBalanced Out (2.5mm, only 4-pole supported | 4.4m, only 5-pole supported)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWi-Fi\u003c\/strong\u003e\n\u003cp\u003e802.11 a\/b\/g\/n\/ac (2.4\/5GHz)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth\u003c\/strong\u003e\n\u003cp\u003eV5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions\u003c\/strong\u003e\n\u003cp\u003e3.01” (76.45mm)[W] x 5.49” (139.45mm)[H] x 0.69” (17.6mm)[D]\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e\n\u003cp\u003eAbout 11.18oz (317g)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature Enhancements\u003c\/strong\u003e\n\u003cp\u003eFirmware upgrade supported (OTA)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\n\u003cp\u003e0℃ ~ + 40℃ (32℉~ 104℉)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAudio Performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\n\u003cp\u003e±0.038dB (Condition : 20Hz~20kHz) Unbalanced │Balanced \u003cbr\u003e±0.45dB (Condition : 20Hz~70kHz) Unbalanced │Balanced\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS\/N\u003c\/strong\u003e\n\u003cp\u003e114dB @ 1kHz, Unbalanced │ 115dB @ 1kHz, Balanced (Normal Gain)\u003cbr\u003e115dB @ 1kHz, Unbalanced │ 115dB @ 1kHz, Balanced (High Gain)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrosstalk\u003c\/strong\u003e\n\u003cp\u003e-135dB @ 1kHz, Unbalanced │ -144dB @ 1kHz, Balanced\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N\u003c\/strong\u003e\n\u003cp\u003e0.006% @ 1kHz, Unbalanced │ 0.006% @ 1kHz, Balanced\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIMD SMPTE\u003c\/strong\u003e\n\u003cp\u003e0.005% 800Hz 10kHz (4:1) Unbalanced │Balanced\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\n\u003cp\u003eUnbalanced Out 3.5mm (1.3ohm) │ Balanced Out 2.5mm (1.3ohm), 4.4mm(1.3ohm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eClock Source\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClock Jitter\u003c\/strong\u003e\n\u003cp\u003e25pS (Typ)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference Clock Jitter\u003c\/strong\u003e\n\u003cp\u003e500 Femto Seconds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStorage Capacity\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Memory\u003c\/strong\u003e\n\u003cp\u003e256GB [NAND]\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Memory\u003c\/strong\u003e\n\u003cp\u003emicroSD x1 (Max. 1TB)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBattery\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity\u003c\/strong\u003e\n\u003cp\u003e5,050mAh 3.8V Li-Polymer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge Time\u003c\/strong\u003e\n\u003cp\u003eabout 3.5hours (9V 1.67A Charging)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlayback Time\u003c\/strong\u003e\n\u003cp\u003eabout 12hours (Standard : FLAC, 16bit, 44.1kHz, Vol.50, LCD Off, Normal Gain)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSupported OS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWindows 10,11(32\/64bit) MAC OS X 10.7\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNote: Audio was NOT muted during the measurement. - The image\/specification may be changed without notice to improve product performance and quality.\u003c\/p\u003e","brand":"Astell \u0026 Kern","offers":[{"title":"Default Title","offer_id":45470258168041,"sku":"SE300 (OB)","price":1804.05,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/files\/SE300_008copy_01755a99-7739-4309-bb37-75fa81ac43df.jpg?v=1762465522","url":"https:\/\/audio46.mom\/products\/astell-kern-a-futura-se300-music-player-with-r-2r-dac-open-box","provider":"Audio46 Headphone Store","version":"1.0","type":"link"}