Thats what I'm leaning towards now. Scrap the input with all those 12AU7s and do something else. Reverse engineering that circuit seems fruitless . Not sure it even worked when built.
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Took a look at those TOA amps. I had no idea there were so many of them. Found a Bogen amp in my junk box. also has a 4-8 and 70.7 output with a cheap 4 band equalizer. Gonna drag that out to see if it has any hope of working.
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Going into my iron now to see if I can support? a single 4-400.
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thanks everyone for the help
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don
