So I spent too much time today trying to figure this one out. I have a couple of old PA speakers with three 8 ohm drivers. I pulled the back off of them because one was buzzing. I saw that they were wired differently from each other so pulled all the wire and thought I'd start fresh. That was a mistake. I found the bad driver and replaced it in the cabinet but am now trying to rewire it. I have wired two speakers (B&C) in series for 16 ohm's. I then fed that pair by connecting the + to the + on speaker A and took a run from that to feed the + on Speaker B. I took the - from speaker C and connected to the - on A which is also connected to the - speaker wire. So I have the B&C pair in series connected to the A in parallel. Does that sound about right? If of course you can understand what I wrote.