stereo/mono WIRING

CG_25 · 14th June 2007, 09:04 PM

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.

[IMG]I want to have the same wiring as this cabinet does. Does anyone know how I should go about doing this properly?[/IMG]

CG_25 · 14th June 2007, 09:42 PM

heres the image

drummer_Dave · 14th June 2007, 10:39 PM

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

CG_25 · 14th June 2007, 11:27 PM

CG_25 · 15th June 2007, 12:57 AM

Wow, thanks, just what i was looknig for. I plan to use this

Artie · 10th July 2007, 12:46 AM

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.

Artie · 10th July 2007, 12:46 AM

Note the path I've highlighted in green. If those two jacks share a chassis ground, it could be a problem.

sreten · 10th July 2007, 11:48 AM

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.

CG_25 · 10th July 2007, 04:23 PM

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!

CG_25 · 10th July 2007, 04:23 PM

I'm starting to understand, but Im still confused

14th June 2007, 09:04 PM	#1
CG_25 diyAudio Member Join Date: Jun 2007	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. [IMG]I want to have the same wiring as this cabinet does. Does anyone know how I should go about doing this properly?[/IMG] __________________ Made you look!

14th June 2007, 11:27 PM	#4
CG_25 diyAudio Member Join Date: Jun 2007	__________________ Made you look!

15th June 2007, 12:57 AM	#5
CG_25 diyAudio Member Join Date: Jun 2007	Wow, thanks, just what i was looknig for. I plan to use this __________________ Made you look!

10th July 2007, 04:23 PM	#9
CG_25 diyAudio Member Join Date: Jun 2007	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! __________________ Made you look!

10th July 2007, 04:23 PM	#10
CG_25 diyAudio Member Join Date: Jun 2007	I'm starting to understand, but Im still confused __________________ Made you look!


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10th July 2007, 12:46 AM	#6
Artie diyAudio Member Join Date: Jul 2007	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.

10th July 2007, 11:48 AM	#8
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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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