i just bought a 99 audi a4 quattro it has the 9 or 10 speaker bose system i wont to install a aftermarket head unit and use my bose system and then later add a aftermarket subs is there a connecter that i can buy to use the bose system with this?

 

yes there is search google i have seen a few sites that sell them

 

yea i have seen them too i have the non bose with the amped rear speaker and i can't rember where i got the speical harness from but it also work for the bose you will need a aftermarket head unit 2 both a front and rear rca output to run the bose amps