HD-400是MPS於2024年上半年發佈的一款全新4芯信號線纜，主材質採用99.9999%單晶銅鍍銀（OCCS）製成， 造就其超高的傳輸速度及無與倫比的分析力。HD-400採用世界通用的USB接線分類，紅、黑、綠、白四芯結構， 綠+白線單獨鋁箔屏蔽之後，再四芯公用鋁箔+銅網屏蔽，超高的屏蔽率讓用於信號線纜傳輸更無損、無雜訊， 無論用於數碼信號傳輸或是模擬信號傳輸、均有十分出色的表現。 聲音效果方面，得益於單晶銅鍍銀（OCCS）材質的超高解析力和明亮但不尖銳的優秀的高頻效果表現；中頻聲 音柔和潤澤、女聲之綿密的臨場感；低頻速度快，有彈性，下潛十足。整體聲音背景乾淨靜謐，三頻高解析， 適用於需要增加解析力和亮度、速度的設備系統使用。 HD-400可用於USB數碼線纜、RCA線纜、XLR線纜等線纜的製作使用 線纜內芯結構：0.25mm²*4/23AWG*4 線纜直徑OD: 7mm±0.5mm MPS HD-400 is new 4-core signal cable release  in  2024. The main material is 99.9999% single crystal copper  silver plated (OCCS), which creates its ultra-high transmission speed and unparalleled analytical ability. The  HD-400 adopts the world's universal USB wiring classification, with a red, black, green, and white four core  structure. The green and white wires are individually shielded with aluminum foil,  aluminum foil and copper  net surround all four cores. The ultra-high shielding rate makes it more non-destructive and noise free when  used for signal cable transmission. Whether used for digital signal transmission or analog signal transmission,  it has excellent performance. About sounds , thanks to the ultra-high resolution of single crystal copper silver plated (OCCS) material and  the excellent high-frequency performance of bright but not sharp. The mid frequency sound is soft and smooth,  and the dense presence of female voice is felt. The low configuration speed is fast, elastic, and full of diving.  The overall sound background is clean and quiet, with high resolution in three frequencies, suitable for use in  equipment systems that require increased resolution, brightness, and speed. HD-400 can be used for the production and use of USB digital cables, RCA cables, XLR cables, and others. Cable core structure: 0.25mm ²* 4/23AWG * 4 Cable diameter OD: 7mm ± 0.5mm