I have a pair of Model two's I bought back in 1980. One of the crossovers was destroyed by a college room-mate who tried to use them as guitar speakers. I had an electrical engineering student buddy rebuild the crossover but there is a noticeable difference between the two(i.e.: rebuilt crossover speaker sounds muddy compared to original). Is there a source for crossovers aside from ebay? Just hooked them up after an 8 year hiatus still sound great either thanks to my older diminished hearing or just a well built product to begin with.