I fitted larger speakers in the footwell of my 1967 Jaguar MK2 but the sound was muffled and higher frequencies gone due to all the carpet etc. I fitted these two speakers next to each other behind the single chrome speaker grill above the stereo. With a modern retro stereo the footwell speakers were connected to the front speaker connections and these two speakers to the rear connections. Perfect, sounds much better and the high frequencies are now present. Sure some of the stereo effect has been diminished as these speakers are right next to each other but no great loss.