That's exactly what I did. Q-logic panels suck but if you have some extra resin and fiberglass knock you're self out. I used them for midrange and they sound great.If you are expecting to get some bass out of those, you are kidding yourself. The Q-logic kickpanels (without heavily modifying them) are basically only good for midrange and higher frequencies. I used Q-logic kickpanels in the Cavalier I used to have and I had 5.25" CDT speakers as well, absolutely no bass but the midrange was okay (I had them on a HP around 300HZ). I had to go with a 3-way system with midbass drivers in the doors. If you are wondering I will probably not buy CDT audio speakers again, they are WAY overpriced for the performance you get out of them. Another problem with Q-logic kickpanels is they have the tweeters pointing towards the the headunit instead of more towards the headrests.