Im not sure if someone has already asked this question but here goes. So i just bought a acura tl type s and i was wondering if it was possible to hook up a sound system with an eq but hook it up to the factory head/navigation system.

 

YES... your answer would be a Rockford 3sixty.2 OEM Integration Unit or equal...

There are plenty of units out in the market right now...

Good Luck...

 

Yes, take the signal after the factory AMP, then hook it up to your EQ, then to your amps and speakers.