I've only heard that PowerMax model on youtube videos, never used one in real life. They sound in the video. The Hoover Elite 7.2Amp 17.0 C.E.A rating motors seem to fluctuate not sure why. Most I find ok and much better in noise compared to several Eurekas and Dirt Devils. However, I remember a Consumer Reports issue I believe 1996 where they rated most Elites as Fair noise level and a Preferred model as Poor noise level. Yet all the machines were rated the same motor.
I've been helping Service Master and Merry Maids these past few weeks with college apartment turnovers. They use commercial 7.2 amp Elites. A few different hood designs but otherwise pretty much the same "guts" inside. Some were definitely louder than others, but that could also be age as a few of these machines were definitely not in the greatest shape. Most of the good condition ones sounder great though, I didn't mind the noise at all.
There is some detail about this in the Elites, Elites, Elites thread I believe as well.
Wish I could be more help. Hopefully John Long will find this thread soon, with his extensive collection, he may know more!!
Happy Hoovering!! It Beats As It Sweeps, As It Cleans!!
