I own a 2003 GS 300 sport design and it is equipped with the navi and the mark levinson sound system. I am have a few problems finding informations for a few questions.

-How to add sub with the Mark Levinson
-Explain phases and how to use them to make the system sound better
-and how to add ipod support to my gs
-any other ways to increase sq items like jl audio clean sweep and so on

Thanks in Advance...
how you all can help

 

wrong place, post your question on the audio section and you will get more feed back on questions.