Hu and speakers

[kaycee]

OK not the sharpest tool in the shed with electronics,I have a Pioneer system HU P2900 and 2 )6x9 in the cab corners allso have a little box for 2 )6.5 that sit on the trans. hump in front of the seat.System sounds good but kinda hollow,I am looking for that crisp clean sound.Do I need an amp or what?? Front 6.5 (TS-675)speakers are 60 watt nom. and 300 watt max the 6x9(TSA-6916) are 230watt max. and 40 watt nom.I thought I was putting together a pretty good system but somewhere along the line I messed up,could use some HELP here