Okay so I have a Jensen vm9214 head unit, (2) 15" subs, (2) 6.5" door speakers, (2) 6x9s in the back dash, and (2) 1.5" tweeters on the side mirror plates. All speakers are on stereo other than subs are on an amp. Well I acquired a 4 channel amp and was gonna run them to (4) 6x9s on that amp. I was gonna put two under the front seat and two under the back seat. Is this a good idea? If I want to add clarity should I get 6.5" speakers instead of 6x9s? My stereo pushes 200watts out of each channel so there is no use in putting the four channel amp on my door and back dash speakers right? My subs are on a 2400 watt amp. btw all speakers and amps are pioneer. Everything matches except the Jensen hu. Just in case it's relevant it's a 96 Camry le 5sfe. Also what about in front of the back seats where the back of ur legs go.