I am planning to replace the whole bose system ( 2001 max) with new hu, 4 speakers , 1 sub, amp to power the 4 speakers, and maybe factory amp to power new sub if possible. I looked into the stickies but most talk aobut keeping the hu , but i want to put in aftermarket one, and want to use the existing wires that run into the doors, is this possible or do i have to run new wires for the new door speakers?

 

don't have to but for better quality is recommended.

you will have to run some kind of spk wire to get to the factory wires. thats if you put the amp in the back. why not just finish it complete. do all aftermarket wires since you have to run wires for the amp anyway.

 

If you are going to change everything do the speaker wire too. the stock wires are really bad.

 

might as well change it all.

 

Change it, its more fun that way and as was said above the stock wires arent that great