The 4 conductor cables use 12/4 SJ type wire. Whirlwind manufactures 6 and 8 conductor cables with 13/8 wire to be lightweight, small in diameter, and highly flexible. Whirlwind supplies two types of multiline speaker cables: EP and NL (Speakon®). They offer 4 and 8 conductor cables in both styles and 6 conductor cables are available in the EP series. NL cables have the same connector at each end.