I've got 4 mtx 7510's. I don't know witch way i should face them in a 2009 f150 super cab. For best spl. Can anyone give me any ideas? What about the ports?
I have'nt had a system for a while and i have never installed one in a truck.
Doe's anyone know were i can get a wiring harness?
Thanks!

 

subs up port up
or
subs up port towards windsheild

 

thanks for the help.
any idea on the spl. that i should get?

 

subs and port facing rear seat is 2 db louder than up.

 

You might have to put a test box in it to see which way is going to be louder for you.