I built my S7R's in 1970, I assisted in managing a small high end stereo shop where i got great deals on Audio Equipment. I chose the Pioneer SF-500 electronic crossover, not too expensive and had the 3 frequencies I wanted, worked well. (using 1970 vintage Marantz 250 with Marantz 33 preamp - 2 - Marantz 1030 amplifiers for LE-85 and 2405's)
Only 40 years later, it doesn't work now - anyone have a clue where I might get it repaired? I am assuming Pioneer won't even mess with it.
I just may sell everything, its all in mint shape, still undecided.