Speakers on floor?

Many, if not most, speaker owners manuals of the higher end, do speak of tweeter height, at least what I have experienced. But more importantly, they speak of the listeners sweet spot, along with speaker/room interaction.

I'm pretty sure most speakers were designed with tweeter height as a priority. Most speakers put the tweeter above the mid/low driver(s), some put them under, some put them off to the side. It's not a random placement of what looks best.

Most recommend the tweeters at ear height. Some people are sensitive to that, and prefer the tweeter above or below that. Room acoustics have a big impact on this as well, as does toe in.

At the end of the day, no two room, speakers, and sets of ears are alike. Experiment and use whatever works best for you. Trying them on the floor and tilting them up doesn't cost anything if you use stuff around the house to get an idea of what's going on. Same can be said for raising or lowering the speakers.

When seated your ear level should be between mid and tweeter.

Got a pair of Mapleshade Bedrock Ultra's yesterday and been playing with speaker placement. So far the product does as it claims. I am using a $200pr of Cambridge Audio S30's with them and i can't believe the sound that is coming out of these things. My room is only 12.5ft x 11ft and i always had a 45hz peak and quite a bit of midbass suckout. I ran some tests with tones and a decibel meter and i still have a peak at 45hz but the midbass is back and i went from a 13db difference between 45 and 80hz to only a 5db peak. The soundstage is wider and the center image is great. Working on the tilt back now, right and left image is a little low. Hopefully i can get it right.

I've had these for about ten years in listening rooms of various sizes. They work. They're unconventional, but they do make a bigger and wider sound. It's the difference between throwing sidearm and coming over the top.