I just purchased two set of component speakers,(there is 8 new speakers) to replace the tired old bose speakers currently in my car. I was wondering if i NEED to rewire the whole speaker system or is it just something that i should do? Might be a dumb question but i want the best out of my new speakers. Thanks in advance for any help....

 

I would... that way you are not using old wiring for new speakers; not to mention, for the $50 in speaker wire and 2 hours (including installing the new speakers) that it'll take, the question is why NOT to?