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線性輸出 (LO) 擴充介面\n\n【JM21 Hi-Fi無損隨身音樂播放器】\n\n入門級價格，旗艦級主控｜\nJM21搭載超越同級產品的全新處理器「高通驍龍 680」。\n這顆晶片使用6奈米先進製程，具備八核心 Kryo™ 265 架構，主頻頻率最高可達 2.4GHz。\n效能提升，功耗下降，帶來流暢的操作體驗。\n\n澎湃入耳，強勁驅動力｜\n在僅有 13 mm的超薄機身中，透過發燒級的電路配置與校正，JM21 的平衡輸出功率高達 700mW+700mW。\n如此強勁的驅動力，渾然天成，無論是驅動入耳式還是大耳耳機，都能游刃有餘。\n\n三種增益 三條曲線｜\n擁有低、中、高三種獨立增益，每種增益分別對應獨立的音量、曲線，可以提升不同阻抗耳機的聽音體驗，進一步適配各類型耳機。\n\n雙旗艦 DAC 晶片：全平衡音訊架構｜\nJM21 使用兩顆 Cirrus Logic 旗艦級 DAC 晶片 CS43198，搭配兩顆高性能運算擴大器 SGM8262，組成了全平衡音訊架構。\n這項設計歷經多款產品的累積與進化，FIIO進一步優化了分級供電和前後級增益，最終呈現出更寬廣的動態範圍，以及更潤澤的樂感。\n\n分級供電，分區遮蔽｜\n數位與類比電路獨立供電設計。類比部分更為精細，DAC、電壓、電流擴大等三層級供電。\n四通道耳機擴大器更分別配置了四顆獨立的LDO精密穩壓器。\n主控、DAC、耳擴部分分區排佈，並各自設定獨立遮罩進行隔離，可以進一步降低訊號干擾，帶來更純淨的音質表現。\n\n定制Android 13 開放式系統｜\nJM21 搭載深度定制的 Android 13 開放式系統，操作起來極致流暢，操控自如。可自由安裝各大串流媒體 APP 或其他應用程式。\n\n第五代 FPGA 搭配定制雙飛秒晶振｜\nFiiO與供應鏈夥伴深度合作，精選 10ppm 低溫漂水晶片、陶瓷鍍金基座以及超低相噪振盪晶片。\n專為 JM21 定制開發了小型化的主動(有源)晶振，並按照飛秒等級進行嚴格篩選，確保產品具備一致的穩定性。\n高精度、低抖動的統一時脈源，超精細的數位音訊鏈路使數位音訊訊號在傳輸過程中被精確還原。\n\nSRC 問題，「全域」完美解決｜\n無論使用 FiiO Music，還是 Apple Music等第三方音樂應用程式進行本機播放，抑或是透過 USB 外接解碼器輸出，JM21 都能實現音訊原始取樣率輸出，使您享有無損音質。\n\n超輕薄機身｜\n耳目一新的天藍撞色設計，提供輕巧好握的舒適手感，徹底解放小拇指。\n還配備了 4.7 吋高畫質螢幕，指尖輕輕滑過，旋律如細水般流淌而出，細膩悠揚。\n\n12.5 小時超長續航｜\n超長續航力，為隨時隨地的聆聽體驗持續保駕護航，幾乎能應付從早到晚的連續播放需求。\n每次聆聽都是愉悅的享受，無需再擔心電量問題。\n\n雙向 LDAC 藍牙連接｜\nJM21 支援雙向藍牙 5.0 發射與接收功能，能提供穩定的藍牙傳輸，達到 Hi-Fi 等級的音質享受。\n藍牙發射編碼支援：SBC / AAC / aptX / aptX HD / LHDC / LDAC\n藍牙接收：SBC/AAC/LDAC\n\n非同步 USB DAC 支援｜\nJM21連接 macOS 或 Windows 系統的電腦，可充當解碼器使用，並大幅提升音質體驗，取樣率最高可支援到384kHz/32bit。\n\n多能接孔，百顯神通｜\n類比輸出\n3.5mm、4.4mm耳機輸出接孔:連接耳機\n可以系統設定中切換成LO模式(LINE OUT)，連接主動式音響或擴大機。\n數位輸出\nSPDIF輸出:連接外接高階解碼器。\nUSB Audio輸出：接外部音訊解碼器。\n\n規格說明\n型　　號：JM21\n主控晶片：高通驍龍 680\n儲存空間：3GB記憶體(RAM)+32GB內建儲存空間(ROM)(可用空間約22GB)\n記憶體擴充：標準TF卡槽，最高支援2TB\n作業系統：Android 13\n工作模式：Android模式/純音模式/USB DAC模式/藍牙接收模式\nWiFi：2.4GHz，支援 DLNA、AirPlay、WiFi 傳歌等功能\nDAC晶片：CS43198 x 2 顆\n運算擴大器：SGM8262 x 2 顆\n螢　　幕：4.7 吋高畫質螢幕 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