I had them surface mounted right behind the windscreen tint firing across the dash at the opposite seat at head height, I didn't take any pictures but they lifted the bass up from the bottom of the doors. I think it gives better staging but its all trial and error what sounds good to me might not suit others . It was a kit similar to this: http://www.ebay.co.uk/itm/Rainbow-DL-C6-3-Dream-Line-165-mm-3-way-System-with-100m-midrange-/281079148756?pt=UK_In_Car_Technology&hash=item41719f70d4