What are my options with my stock GPS for a new sound system. (i would like to get a sub, but i don't want to change my GPS. can it be done?)

 

If you have speakers in the car which are used by the radio, and no auxiliary outputs from the radio, the very simplest thing to do to add a subwoofer system is to get a high input-impedance line level converter and tap off the existing speaker line. Then run the output of that to your sub amp.

 

sweet, thanks for the help XD