Infinity Kappa 9's Tweaks?

Calling all classic Infinity Fans. I have a set of Kappa 9s and they are a bit much for my modest listening room. They are so dynamic that they tend to fatigue, and moving away from them helps but room restraints prevents this. Also sound batting is not an estetic option. Does anyone no of a tweak with covering part of the tweaters with felt? This was mentioned on audio reveiew and I am not willing to permanently change them with crossover or wiring mods (they are getting to hard to find stock). Also I have tryed EQ's but always seem to go back to my foreplay tube preamp only.Thank you for any help. Audiogon is a great site. Guycom