2005 accord sound system question
 

whats up guys? im new to the forum and i have a quick question. i have a 2005 accord and i want to keep the headunit stock but i wanna put in a sub. i heard i have to splice speaker wire in the main harness to get the RCA's in. has anyone done the job themselves and can give me a few pointers..?? and also if u can let me know how to get behind the headunit which i was told i have take all the dash panels off. if anyone knows anything about please let me know.... THANKS!