THICK SPEAKER WIRE - Speaker Cable copper wires come in stranded wire designs, long or short wire lengths, and thin or thick wires. Suitable for 12V wire gauge (12 volt wire gauge), but max voltage of 30V. COPPER CLAD ALUMINUM (CCA) - Solid bulk speaker wires made of cca are lower priced than pure bare copper wire for the same conductivity with an aluminum core. CCA Speaker Cables provide the same conductivity with slightly higher resistance. ONE SPOOL 100 FEET LIFE TIME WARRANTY SOUND WIRE WITH POLARITY - Speaker Wire audio sound cables come with colored pvc jacket for easy polarity identification. Typically, red speaker wire (light color) is positive and black speaker wire (dark color) is negative.