frippfan

Any suggestions for materialistic composite to put on the outside of the horn in order to get more highs and better imaging?

Extended highs and better imaging.

I have a pair of Klipsh RB-511's and I'm interested in making inexpensive improvements or modifications without taking any serious risks on causing damage to them. I'm running them on Hardon Kardon equipment. Any suggestions? (I love these speakers; plan on keeping them forever).