S-4000D
分线器和电源分配器
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“REAC 嵌入式电源”是 Roland 自行研发的一项技术，允许传输数字音频信号的同时为连接的设备供电。而这一切只需一根 CAT5e 线缆即可实现。S-4000D 分线器和电源分配器设有 10 个 REAC 端口，其中 8 个为 REAC 嵌入式电源端口。S-4000D 可以自动检测并识别出不支持 REAC Embedded Power 技术的产品。当连接的设备不支持 REAC Embedded Power 时，可以将 S-4000D 用作一台标准的分线器。
*若要使用 M-48，则需要使用 S-4000D。
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