depending on the size of the room, I'm not that worried about the ear level "rule", especially with a horn. I think that started when those highly directional 1" tweeters were the rage. I like the size of the Pi4 cabs in my room and there's excellent dispersion all over, up and down and across.Speaking of Plant and Krauss, I saw them a week or so ago and it was an incredible show! I hadn't heard any of the album and didn't know what to expect, but it blew everyone away. They did songs from the album, a few Zeppers (Black Dog was great!), and Allison did a few solo, including going down to the river to pray. If there'd been a river, everyone would have been in it! If you get a chance to see them don't miss it.