A:Answer Thanks for the question, Poly. You want to choose the gauge of speaker wire based on how long the wire needs to be and be sure to use wire rated for use outdoors:
20ft max - 18gauge; 30ft max - 16gauge; 50ft max - 14gauge. if you have any further questions, please reach out to our Support team at https://www.bose.com/en_us/contact_us.html.
Thanks again for the great question! Suzanne - Bose Support