Which cable should I get? What length? Why bother? Use your existing FireWire 400 cables with this FireWire adapter from Sonnet to connect FireWire 400 devices to a FireWire 800 port, without going through the trouble of purchasing yet another cable. Just plug it in between a FireWire 800 port and a standard FireWire 400 cable's 6-pin male connector (the other end of the FW400 cable plugs into your FireWire device). It can't get any simpler. 9-pin male (FW800) to 6-pin female (FW400) connector adapter Works with standard 6-pin male FW400 cables Connect legacy FireWire 400 devices to FireWire 800 ports used on the Allegro FW800, as well as the latest computers that feature FireWire 800 IEEE 1394 compliant