I am a second time Expedition owner, first a 2008 EL Limited with the Pioneer factory unit and was actually blown away by the system. Literaly would rattle the rear vent windows. I just purchased a 2015 EL Limited with the Sony unit and love the highs but strain to hear the lows. I've been a DIY stereo guy in my youth but now, typically stick to factory... That being said, this Sony will simply not do. My question is, I visited a local stereo store with a solid reputation and they quoted me a YL Stealth box system with a new sub amp and frequency adjustment nob for $1,200.... YIKES!!! after spending $40k on the car, the budget for that doesnt exist. So here is my question for the group...
Do I need to replace the factory AMP or can I simply replace the sub? According to the shop they said you cannot bolt a non OEM sub in nor could you tie it to the existing AMP. My 21 year old is ready to prove them wrong but before I let him in there, I wanted to seek your guidance. Simply adding a better sub with everything else factory will be fine for me. But if I need a new sub, new AMP and new wiring back to the battery, I might let my wife drive it and go back to my Audi.
Thoughts?