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Valve Junior/Senior 1X12 cabinet Parallel Jack

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Yep, that's parrallel. Don't forget you will be changing the load on your output transformer when you have the second cab connected, so you'll need to find out what the impedance of each cab is and do some math to figure out which output to use. This site has a calculator you can use, and some useful wiring digrams in case you need to rewire it series parrallel or something: http://www.bcae1.com/spkrmlti.htm


If you run your OT at the wrong impedance, you can kill it...

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