Contact Al @ ALK, he has the tweeter attenuators.
Klipsch Mod
I've upgraded the crossovers and internal wiring, lined the cabinets with anti-vibration sheets, upgraded the speaker connectors and I'm about to solder the speaker connections. (Waiting for Crites titanium tweeter diaphragms to be back in stock). Im considering putting in a high frequency attenuator like you see in older speakers like altec lansing santanas, Sony HPM 100s, etc. What do you think?