Quote Originally Posted by french080 View Post
when i put my 12w7 in the installer suggested rear deck, and said he would leave the 6x9 holes, use for blow thru, and install some 6.5" components in the rear next to the 6x9 openings. didnt have the cash to do that, but it wouldve been sweet. dont just use rear subs. u can put a sub in between the stock rear speakers, giving you better sound imaging, so u dont just hear the subs only. u could do 1 10" or 1 or 2 8" subs, just depending on what u were feeling. it also looks way cool
I left my 4" speaker ports open, for this very reason in the rear deck. But in all honesty, I have not seen the value of it that others have spoke often about. Maybe when I get my new dual 10's sub box created it will be different.

I am currently a running a 12" RF Punch in a sealed Sub Zero box so I am not blowing out tons of airs from the box. And my next box will also be sealed one, so I am thinking leaving my 4" speaker ports unused is kind of a waste. I might have to find some nice mid range 4" speakers to drop in there or something.