If you put them in your dach on thier side, even if you aimed them at center, the sound would appear beside the driver and beside the passenger since the wave is very narrow out the ends on the speaker. If your head was in the very center of the car it would be fine but it isnt.
If you put them in the kickpanel location though, the pattern would be extremely wide and sound much better. If I move my head forward or back a foot it completely changes the sound.
Trust me, mine aren't bolted down and I have had them all over the place
