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Old 14th June 2007, 08:04 PM   #1
CG_25 is offline CG_25  Canada
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Default stereo/mono WIRING

Alright, I plan to make a 4x12 guitar cabinet. Before I start I want to lay out all my plans. What I need to know is how to wire the cabinet so i have: a mono (8 ohm) input, individual left and right inputs (at 4ohms each) and an output.

To get a better Idea of what I want, look at this MESA jackplate.

Click the image to open in full size.

[IMG]I want to have the same wiring as this cabinet does. Does anyone know how I should go about doing this properly?[/IMG]
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Old 14th June 2007, 08:42 PM   #2
CG_25 is offline CG_25  Canada
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heres the image
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File Type: jpg mesa cabinet jackplate.jpg (47.7 KB, 258 views)
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Old 14th June 2007, 09:39 PM   #3
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I am pretty sure this would be correct, any one want to back me up on this.


check out this link it should help also

http://colomar.com/Shavano/spkr_wiring.html

good luck
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File Type: jpg 4 ohm 8 ohm.jpg (18.4 KB, 250 views)
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Old 14th June 2007, 10:27 PM   #4
CG_25 is offline CG_25  Canada
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Click the image to open in full size.
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Old 14th June 2007, 11:57 PM   #5
CG_25 is offline CG_25  Canada
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Wow, thanks, just what i was looknig for. I plan to use this
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Old 9th July 2007, 11:46 PM   #6
Artie is offline Artie  United States
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Hey CG; One caution. If I'm reading that diagram correctly, and if you use grounded jacks, and if use a metal mounting plate . . . you'll have a dead short from hot to ground.

Let me study it some more, but I wanted to warn you before you fire anything up. Literally.
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Old 9th July 2007, 11:46 PM   #7
Artie is offline Artie  United States
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Note the path I've highlighted in green. If those two jacks share a chassis ground, it could be a problem.

Click the image to open in full size.
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Old 10th July 2007, 10:48 AM   #8
sreten is offline sreten  United Kingdom
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Hi,

that green path is a problem. The diagram is not correct.

What you need to do is assume that they are switching jacks.

That is each jack has four connections, with no plug inserted + joins +,
- joins -, with a plug inserted only the input + and - connect to the lead.

So you do not wire it as a normal parallel/series 4x12 for the 8ohm
jack, as shown. The daisy chaining output socket is fairly obvious.
The two 4 ohm jacks are wired into each series leg, and with no plugs
inserted they provide the series connection represented by the green
cross connection. This path should be broken by either 4 ohm plug.

Make sure you get all your phasing correct.

The switched tip of one 4 ohm socket connects to the switched ring of the other.
The other two switched connections remove the connection to the 8 ohm socket.

/sreten.

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Old 10th July 2007, 03:23 PM   #9
CG_25 is offline CG_25  Canada
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Default a little confused

Thanks for the help, are you sure it won't work? I'm not really understanding what you're trying to tell me. Do you think you could draw up a simple diagram for me to follow!
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Old 10th July 2007, 03:23 PM   #10
CG_25 is offline CG_25  Canada
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I'm starting to understand, but Im still confused
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