Carl, I'm brand new to this site and have managed to pick up two pair of Large Advents, one is the NLA (paid $10 for the pair at a local thrift store and refoamed them myself) and the other is a later version without the switch. hey are marked 'ADVENT/1' on the terminal plate. (refoamed them as well). I wondered if you could post a circuit diagram of your new crossover including connections to the woofer and tweeter. It would really help my understanding.