Thanks for the info Wayne. Regarding the 10" driver in the 7 Pi, is there any benefit in upgrading the driver to an AE, or is the stock sufficient in that size? Also, I have read a number of posts where you speak of your fondness for the Pi 3s and 4s, but I have not noticed much on the Pi 7. Although one of the reasons I was choosing the Pi 7 was aesthetic (I'm planning to use it in a stereo setup in the living room, where they are readily visible), I assumed there was some benefit to controlling the sound wave below 1K. In the context of stereo, how do you find the 4s and 7s compare (each with upgraded drivers where applicable)?