Griffin Technology today announced three new additions to its Clear Choice line of cables. Included in the new offerings is a 6-foot FireWire 400 connection cable (US$14.99), a 6-foot FireWire extension cable ($14.99) and a Ground Loop isolator cable ($19.99), which eliminates the low, audible hum called a ground loop that often occurs when two pieces of audio equipment are connected together but plugged into separate outlets.