ok i understand What your saying but i still have more questions. what is the proper volume i should set the head into and my phone?? Also is there any solution to fix this problem so i can be able to max out my phone and the head unit?? Should i upgrade my head unit for a more efficient and powerful stereo??

 

where can i still get the 4080 sub for like $100

 

This one is local to me

Check out this item on OfferUp. https://offerup.co/jK31VSBtVIb

 

$100 isn't going to cover shipping, so only good luck and a local deal will get you that.

 

bit late but not sure where the bloody bose amp is
infiniti g35s 2007 sedan
has fuses for bose and bose speakers

 

Here's your Factory Service Manual:
https://www.nicoclub.com/service-man...F2007%2Fav.pdf
Scroll down below the "viewing window" on that page and you can "click here to download a copy".
Bose amp is in the trunk, mounted on the underside of the rear window deck, driver's side.

 

Its located here in the coupe. Im sure its no different in the sedan.

 

is it this, i’m positive it has bose because there are bose fuses.

 

Hmm…doesnt look like it. Unless the changed the look throughout the years.

Check out this thread as it might help: https://g35driver.com/forums/audio-v...tall-pics.html

 

No, that's not a Bose amp. Not sure what that is, possibly the LAN or CAN controller? Bose amp - if you have it - should have a bunch of fins on it like the pic below.
I don't know what you mean by "Bose fuses" but if it's a Bose rig the word Bose should appear on the head unit.

 

nicoclub.com will have the factory service manual you can download for the 2008 sedan. Section AV will have a diagram. Here is the diagram for my 2006 sedan (RIP). 2008 may be different since that was next gen.