Mick,
What you have are the 1950's/early B199 woofers. They have the same tone and sound signature as the later woofers. But they can't take the power, so be judicious with the volume knob. And as you suspected, you have the early paper cone midrange. While it's not quite the performer of its later cousin, it's still a decent driver. It's the tweeters that are going to be your weak link in your system. So we'll just do our best. If you could source a set of the later B200Y tweeters with the aluminum cones, that'd be spiffy.
The following steps are non-optional. These steps will add a magical tone and experience to your Bozak system, this is why you drug this home. And even with your compromised tweeters and paper cone mids, you can really jack up your listening experience. But only if you follow these instructions. Remove the fiberglass and toss it. Line the cabinets with 2" thick 100% cotton upholstery batting. I recently found mine for a project on Amazon, it's also found locally at stores where they sell cloth and upholstery supplies. Fiberglass and that cotton blue jean insulation are acoustic brakes. What that means is all it's doing is making your cabinet smaller. And you can actually hear the backwave of your woofers going thud into the fiberglass. This becomes apparent when you can A/B with a properly prepared cabinet, you can actually hear the difference. It's remarkable. The cabinet with the cotton has a deeper, tuneful thrum. It's a lot like an instrument might have, it's really quite beautiful. Fiberglass? Thud thud thud. You also must fashion a swinging curtain inside your cabinet. This curtain is hung from the top, stretches from right to left and is mounted about halfway from front to back Google images will have some pictures for you. Also look up the word scrim. Using 3M spray adhesive, affix the cotton to the walls of your cabinet, to the back cover of the cabinet, and the scrim to your curtain. Cut 2" square cardboard pieces and use a big stapler to affix the cardboard pieces spaced out over the cotton as a mechanical fastener here and there to help hold up the cotton. All this is just as important as new caps for your crossover.
8" plastic flower pot over the back of your mids, lined and covered with the cotton. This will make your mids far more coherent, clean in their performance. Cheap upgrade.
Replace cap for cap in your crossover to make it easy on yourself. But I'd bet your tweeters have an 8uF cap and your mid uses a 25uF cap. Pat Tobin's work doesn't apply to you, his stuff was for the later aluminum cone drivers. Not for you. No big deal anyway, we don't use his tweeter circuit anymore anyway.
I've attached a picture of a current project of mine. Notice the upholstery batting? Do that. Since mine is an Altec, no curtain. But you get the idea.
Biggles
