It's evident from the many restos I've done of vintage KLH speakers that the designers made, in restrospect, some bad decisions regarding crossover caps. I think most will agree, if one acquires a KLH-5 or 6 or 12, etc, the first thing they do is recap them as most contain those black caps with the red ends along with some brown ones with 3 wires exiting them. Those are the double duty caps. Well, those black jobs with the red ends fall into my catagory 'the uglies'. I believe all were made by t