I am no expert on this subject or even close. However, I knew the stock speakers on my 2003 Nav system were very average. For $100 plus $60 inst. I got two Sony Xplod 3-way for the front and I like them a lot. I got them at best buy.Now I want to put a sub in but don't know where to go.Good luck.

I am looking for a suggestion for a good affordable aftermarket sub for my vibe. Does anyone have a suggestion.