what to use to angle a center channel speaker down

Lovan makes a small stand called a "center director". It is used to angle a center channel up. But I am using one backwards to angle a speaker down. Seems to work well for me. Only down side is no angle adjustment. But it does adjust to accomodate a wider speaker.

i use a book

aloha keith

I use and old mouse pad cut up into smaller squares. I stack 3 in each corner of the rear and in the front I use a Square on each end. Works pretty well IMHO.

How about a pair of door stopper? Or to be more sophisticated, order Sorbathane pads from an industrial supply company (like McMaster-Carr) and build one to spec.