And to add to the other guys question....ask you installer about adding a signal line driver it is a simple install and adds 1/3 to 2/3 more signal power to any audio sys with an amp....they start around $30.00 for a *(PAC) line driver and PAC is a great mobile audio accessorie...you can get others like audio bahn,kicker,audio controll,.,,but then ur gona spend a lil more then $30.00 in parts :D ...