Bruce Edgar recommends lifting his mid-bass horns a few inches off the floor. My implementation of his mid-bass weight so much I had to put them on casters so by default they are lifted almost 3". The bass horn is also lifted ~3" only because the casters make it easier to adjust room location.
I've not heard anything as tuneful as bass done by horns. YMMV.
I've not heard anything as tuneful as bass done by horns. YMMV.