NA1394-6-W -- Firewire 6 with IEEE 1394 6-pol receptacles on both ends, Nickel D-housing NA1394-6-W-B -- Firewire 6 with IEEE 1394 6-pol receptacles on both ends, black D-housing Due to the rising digitisation the interface problems between audio/video networks, IT equipment (e.g. Mac) and mLAN connections increase. Neutrik's Firewire feed through type 1394a, mounted in the standardized D-shape housing, solves this problem.