Speakers on carpet or bare floor?

You might find that nuts or balls sound best...sorry, I have that juvenile thing too. What about spikes, or I had great success with symposium svelts, although they will run around $350 used. I also have some of those square cork things with the rubber on the outside laying around here somewhere. I don't remember what they're called but PM me if you want them cheap.

Have you played with tilting them upwards or placing them in a different position? The carpet probably has less to do with it than the room dimensions. It seems like you are dealing with different overall acoustics more than speaker height.

Grow some nuts and move them around. :)

What Stanwal said is helpful. I don't know much about glass walls but it sounds like other frequencies may be more prominent to you now. Try to recreated the room boundaries you havd before, like similar placement from back and side walls etc. Adjust listening position too.

Move them around 6 inches at a time until you find something better, than make smaller movements. Plenty on speaker placement to be found on this site.

Sweet 24x14 sunroom!