Speaker Wire Color Codes | GOHTS Wiki Speaker Wire Color Codes. Four conductor speaker wire usually has a black, green, red, and white (or yellow) wire. Server does not support image manipulation. Although there is no standard that we know of, we have found that most contractors use the following logic: Since two conductor speaker wire usually has a black..List Pages · Register · Blogs · Last Changes · Categories · Audio What are home stereo speaker wire color codes - answers The first is generally the ohms rating of the speakers. Most home speakers are rated at 8 ohms impedence, while car stereo speakers are rated all over the place, generally 4 to 10 ohms.