Shag Carpet
I have one of these vacuums. Was just curious. It is 5 amp and much lighter than the earlier ones. I always felt the heavier the vacuum the better it grooms the carpet. After using the 1934 on my plush, I didn't feel it brushed the nap as well, however, I did not put a Vibra Groomer Brush roll in it.
Just my thoughts on the subject
Bud