4x12 Stereo Cabinet Wiring

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Hello PC Biz

You should be able to figure this out once you have the plate in hand.

Assuming 8 ohm speakers, wire each pair in parallel for 4 ohms per pair. Run each pair to one of the 4-ohm jacks.

Most likely one of these jack has a NC (normally closed) switch connection by way of a contact built-in as part of the jack. When nothing is plugged in, this connection will put the two 4-ohm pairs in series to make 8 ohm mono. The mono in and out jacks will be connected to the 4-ohm jacks but should not be used unless nothing is plugged into the 4-ohm jacks.

I may not have this exactly correct, for example the jack could use NO (normally open) instead of NC I suppose, but it should become obvious once you trace the wires. Do a sketch of your proposed wiring with the plate and switch function, and this should help sort it out.
 
Thanks for the reply. I got the jacks today, but Mesa didn't send the jack plate. They didn't charge me for it ($7), but hopefully it's on the way. I've got a call in to see what happened. More later.
 
Thanks to Boogieman75 for reminding me of this thread. Mesa did indeed have some great wiring photos, and they didn't even charge me for the jack plate! A belated thanks to Mesa. Here are the shots:

http://traveladventure.tv/mesa/412DIAG.jpg
http://traveladventure.tv/mesa/4x12_jackplate_wiring_illustration_001.jpg
http://traveladventure.tv/mesa/4x12_jackplate_wiring_illustration_002.jpg
http://traveladventure.tv/mesa/4x12_jackplate_wiring_illustration_003.jpg
http://traveladventure.tv/mesa/4x12_jackplate_wiring_illustration_004.jpg
 
Oh, hi, I know this is an old post, but, I can't find anything atm, I have a Mesa 4x12 4FB Cabinet and I think I have the same problem with the connection with the jack plate. It has 4 jacks on it, 2 for 4 Ohms, one for 8 Ohms and the other just says Out. So, my question is, how did you connect this? Cause the pictures isn't available anymore. I hope anyone can help me with this. Thanks!
 

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