Car audio speaker wire is responsible for most of the loss of sound quality in an otherwise high quality vehicle sound system. Speaker wire that is too small for the amount of power produced by an amplifier will choke the current flow to the speakers, causing distorted audio reproduction and a loss in power levels. Any quality wire of sufficient gauge will work perfectly well in your high end car audio system. However, some installers have brand preferences. For three decades, Monster Cable has been the favorite speaker wire brand because of the high quality heavy duty outer liners, true wire gauge sizing, high quality copper wire and easy to use connectors. They also come in a number of stylish colors and with gold connectors.
For more info, see 3 Facts about Car Speakers