Next time you talk to the Bozak guy, ask him when the 302's were made. There's a date code on the sticker, on the backs. I believe it's post 1962 that have the aluminum cone tweeters and mids. Otherwise they're going to have the paper versions and that's not what you're looking for. I suggest pestering him and get those, put your time and effort into something that you could very well be buried with. Bozak's B209B midrange is still considered to be a world class driver, and the B199 12" woofer is absolutely divine. The detail and precision stands up to today's music without skipping a beat. I can go from 1950's Cuban Jazz to Justin Timberlake, easy peasy. You're looking for the Tobin 104T Schematic for the updated crossover, and it's necessary to bring the drivers to their best. It incorporates a Zobel network for the tweeters, flattens their response so you don't get any spikes. It crosses the woofer over at 400Hz vs 800Hz, lightens its load. And it changes the crossover for the mid from 2500Hz down to 1250Hz. That sounds really odd, but the B209B's impedance rises as the frequency goes up and it gets really bright. The crossovers are fairly simple to build, just take your time and you'll have it down in no time. Here's a pair I built for a customer, quite a bit of fun.
Biggles
Biggles
