No, under the seats is what I want. I was hoping there was a unit that would not affect seat operation. Andy
Under the seats IS an option, however I don't think it's an option worth wasting your money on.
Again, subwoofers NEED airspace/enclosure to function optimally.
Moving air is HOW subwoofers create the deep tones. Airspace is what makes a subwoofer sound like a subwoofer.
There's simply not enough space underneath the seat for a subwoofer of any reasonable size.
The largest you're going to fit underneath any of the TJ seats would be something along the lines of a 6" subwoofer, which is almost quite literally the size of your sound-bar speakers.
Again, since the subwoofer IS so small, and the enclosure is also small, performance probably won't be anything close to what you're expecting/imagining.
(to put it into correlation with the TJ platform, the factory/oem console subwoofer is 6.5" in size)
Most modern vehicles with factory subwoofer options have at LEAST an 8" subwoofer.
(which 9 times out of 10 STILL sounds inadequate if you enjoy your music)
However, if you're absolutely dead set on that route, this is probably your best option...