I'm looking for a schematic and a drawing showing the way the original crossover connects to the separate tweet/woofer connectons on the SMGa. I rewired for active XVER and didnt take pic. Do the tweeter and woofer go to the same solder blobs or are they different on the R/L.
so can anyone tell me which components are for the tweeter and which for the woofer. Is the capacitor in the woofer circuit and the inductor in the tweeter circuit?
I just got a pair of SMGa's off craigslist for cheap, fully expecting them to need rewiring. But, surprise, all the wires are intact, no sign of pitting or pulling away! No sign it was ever redone either (or if it was, they kept the wires dead straight). I did have one tweeter silent and intermittent contact on the other speaker, happeing inside the solder blob terminal connections that connect the aluminum wires to the copper wiring and crossover stuff. Evidently it oxidized itself into insulating, or got embedded in a flux blob? Anyway, pulling the aluminum wires out using a wide tip 750F soldering iron, cleaning the wires gently with 600 grit sandpaper and pushing it back into the melted soldering blob was all it took, they play as good as new. They even measure reasonably flat, with the signature dying high end above 12kHz. The panels are like 30 years old, I'm shocked! They need new socks, though, so I have a set on order.
The schematic for mine is a little different (though functionally the same) from the one linked above. (or maybe the left and right channels are wired differently? If that's it, then this is for the Left channel):
The 100m Ohm resistor is a fuse.
Here's a measurement (quick, there's stuff behind it and it's not more than a few feet from a wall):
Never realized it, but these things are roughly linear phase!?!
I've since peaked up the HF using a MiniDSP, improves the sound tremendously.