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.