We recommend that you get stranded cable that is specifically designed for use with speakers, not just lamp cord or (heaven forbid) telephone wire. Your choice of wire can effect the sound quality of your system and we recommend better-quality branded wire such as Monster Cable, Kimber Kable, AudioQuest or the like. For connecting lengths less than 25 ft. use either #18 or #16 gauge, for connection lengths greater than 25 ft. but less than 50 ft. use either #16 or #14 and greater than 50 ft. use #14 or #12.