You would get sound from that location.
For those old guys that were raised with albums like Pink Floyd's, Dark Side of the Moon or were raised on mostly '60's classic rock stereo S E P A R A T I O N is the key.
I'm not an audiophile and I don't sit on the floor anymore with my Denon amp releasing the sound off vinyl to my headphones on the floor like decades past.... (miss those days) but, I can't stand mono sound... just can't. Pandora is notorius for not paying premium coin to starving musicians (record labels anyway) for studio recordings instead they play live crap where the band is playing in a large concrete structure so the recording quality is worthless.
Sub's are pretty much non-directional sound so you can mount 'em anywhere but mid's and tweeters need to be set up so the driver hears true stereo separation sound. I never listen to tunes with a navigator sitting next to me so that's a non-issue.
Get something that will fit under the reat seat, raise the seat an inch or two if needed and blast away. You'll be surprised by how much mid's you miss with the placement but it will get you sound and it will be totally out of the way. Bronco's aren't known for being a great arena for a concert. anyway... lol