Hi All

The Audi A3 is my 7th car and in all my cars I've had a sound system of some sort installed.

In the A3 I have the Symphony II with 6 CD Changer built in. I'm happy enough with it but I'm looking to install my Focal 10'' Sub and also get some Diamond speakers, sounds simply enough.

Problem is I don't want to replace the head unit (although I have a 300 Alpine head unit in the garage). Will I still get a good enough sound from the current head unit and will the Sub go into the unit ok?