When I acquired my Super Reds with the electronic crossover and eq units, I knew they were something special (rare) but could find no information on them. Someone saw them on AudioKarma and rememberd an old magazine article mentioning them. Apparently there were 30-40 of these time aligned electronic "Time Sync" crossovers made for use with the Super Reds. They were made by AudioTechniques.


https://lens.google.com/search?p=ASQ...1URmhPUT09Il0=



https://worldradiohistory.com/Archiv...DB-1982-08.pdf