Originally Posted by CoreyZ
Yes... the stock amp/speakers suuuuuck hard.
Replace them with whatever. You have RCA pre-amps on your head unit so its an easy connection. New 4ohm speakers for the sound bar (coax) and 4ohm components for the front. New sub that can take some power and new amp(s) to match.
There are quite a few smaller amps that fit under the steering wheel like the stock one does. Its actually got quite a bit of room in there. Or you can look to mount them in the glove box or behind it. Some folks mount them under the seats as well.
Agree with this, the OEM speakers (even upgraded) are not very good. If you have the aftermarket head unit, that is the most important part to adding aftermarket equipment.
You could probably get some lower end speakers (still better than stock) that will work fine off the head unit power. However, as mentioned, if you want it to sound better, you will want an amp and speakers.
I pulled my system out of my last vehicle so it's older stuff. I have a Kenwood NAV radio, JL 4 channel amp for JL separates up front, Kenwood 6.5" coaxials for the sound bar. Kicker 10" sub in the rear with separate Precision Power amp. Both amps are installed under seats (1 under each seat).
As mentioned, they now have much smaller amps that you can put behind the dash.