I needed an upgrade from my small underseat subwoofers to something with just a little more punch while still saving space in the trunk from a real subwoofer. I decided on these and yes, they do fit with my seats all the way down and across. They are much larger and sound about 50 times better than the oem ones. Wasn't too hard to wire up and get done. They have their own knobs to control the amount of bass which is pretty cool. These cover the midrange bass really well.