SoundBox Connected 18 Gauge 1000&rsquo; Speaker Wire 18 Ga Clear Home/ Car 1000 Ft. Speaker Cable Spool SoundBox Connected Series 18 Gauge Speaker Cable Extreme Heat Tested- 1000 Ft. Spool Grade A- Copper/CCA Speaker Cable Use: Home or Car Double Conductor Easy Wire Identification- 1 Side Brown- Positive (+)/ 1 Side Silver- Negative (-)