The Wireworld Insta-Wire Luna 16/4 is the improved version of the Luna 5.  This new flat design has 4 conductors for use with either a single speaker or split out bare wire to a pair of speakers. The Luna 16/4 works with the Insta-Wire connectors to provide the DIY'er with a sonically satisfying cable to wire your theater and home with.

You can read more about these cables at www.wireworldaudio.com.