1968 Dart speaker options

In mine I got two tweeters in the stock dash location, rounds in the kick panels and a single amped sub in the trunk. Sounds great and you can hear it fine unless your on the highway with the top down. You don't hear the sub too much then but still hear what's up front. My cars kinda loud so that doesn't help though. Years ago on another conv I put them standing up on the rear floor. The bottom of the rear seat overhangs the floor pan. I pretty much enclosed most of that area mostly flush with the back seat, like a small speaker box and cut the holes for the speakers. They face forward so the sound mostly stays in the cabin.