I have searched this forum and googled everything I can think of to try and find a wiring diagram for a 4x12 guitar cabinet. The guitarist in my band has an old late-70's era marshall cab which I took apart yesterday and found that two of the speakers are no longer even wired in. The speakers are 8ohm EV SPO/12L's. I'm afraid that maybe someone cut out the speakers because they blew out a long time ago, but there's one way to test it... I need to rewire this bad boy. If someone know where a diagram can be found for four 8 ohm speakers, I'd be most appreciative. Thanks in advance.