man try doing most of it urself its easy, look at the positives the most damage u will do to the amps are blow and fuse and just get tonkins or someone to do ur deck, i do all mine, and mates and could tell u over hear how to do it all, JB was gunna charge a guy i know 170 to change over just 4 speakers i did it all in 2 and a half hours and made 100.