Firewire: IEEE1394 supports up to 63 devices with maximum cable length of 4.5 M between devices.... The maximum number of hops in a chain is "16" for a total maximum end-to-end distance of 72 M. The IEEE 1394 standard supports daisychaining and branching or peer-to-peer implementations. Connections can be free-form, mixing branches and daisychains. .... USB: USB is a hub architecture.. Since each hub is a repeater,,,signal can be propagated through additional cables for up to six total hubs for up to 5 M as Maximum.. </font><blockquote>引言:</font><hr /> USB 1.0 和 2.0 cable的最長距離相同嗎？ </font>[/QUOTE]應該一樣吧,,,, 不過cable接太長,應該還是比較容易有狀況.... AES 號稱cable limitation 是100 M以內無須repeater,,,, 實則不然.......