I will be doing the c8 in the doors c4 mid in the kick and the tweeter in the dash. The c8 have more output volume/deeper bass then the c6 for sure. I installed the c6 in a dodge challenger doors of one challenger then c8 in another challenger. both sounded great, but the one with the c8 had better doing lower range and it help to have more cone area. I will be ordering mine soon to start my car for my shop.