The discussion, "Modernize the Klipschorn ....", brought out a point that the K-400 throat and driver may be mismatched. It got me thinking about my own La Scalas. I bought them used and I am probably the 3rd owner. If I remove the K-55-V I have a red rubber washer in the throat and its i.d. is less than the i.d. of the horn and less than the o.d. of the screen protecting the phase plug of the -V. I'm pretty sure my speakers were monkeyed with before I got them, I just don't know how much. What size washer is correct? Shouldn't its i.d. be a smooth fit with the i.d. of the throat?
John