My local dealer builds custom speakers. He is currently working on a pair of crossovers for me. It is taking some time to get the very specific parts he uses in his top-end crossovers, particularly the very old and HUGE caps. With my crossovers, he is having a hard time getting the specific vintage wire-wound resistors that he wants. As with all vintage parts, one often has to cull through many to find ones that perform according to specifications.