Author Topic: A/B Box  (Read 1216 times)

thetrend77

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A/B Box
« on: August 29, 2011, 03:15:45 PM »
Could someone tell me how I would go about making an A/B box with 2 inputs and 1 output? Every one I've found online has been for 1 input and 2 outputs.

I want to use it to have 2 guitars going into one amp, that way I can just switch guitars and stomp on a switch instead of having to change my cable every time.

Myramyd

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Re: A/B Box
« Reply #1 on: August 29, 2011, 03:44:08 PM »
If you just want a passive A/B box then plug it in "backwards" to do what you want to do--i.e. outputs become inputs, input becomes the output. Wires are wires.

http://www.beavisaudio.com/projects/ABSwitches/

J

thetrend77

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Re: A/B Box
« Reply #2 on: August 29, 2011, 03:46:54 PM »
Yeah I saw that page, but I didn't know you could plug them in "backwards" lol

So that last one on there, with the dual LED indicators would work like I'm wanting it to?

jkokura

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Re: A/B Box
« Reply #3 on: August 29, 2011, 04:08:17 PM »
Yes, an A/B box will work either way as long as it's passive. If it's active it may not work either way.

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Myramyd

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Re: A/B Box
« Reply #4 on: August 29, 2011, 04:11:53 PM »
I don't see why not. I used to use an old DOD A/B box to do what you are talking about. It would have been of the 1st design.

You are adding extra wires where you don't "need" them so as long as you have a buffer somewhere soon thereafter you won't get any tone suck.

I had thought about building one for this purpose but sticking a buffer before the output (after the switch). So in that plan, it would intercept the blue wire with the input going to the switch and the output going to the tip of the "input" jack (as labelled there). But after that it would only be used in that direction--2 to 1.

J
« Last Edit: August 29, 2011, 04:15:30 PM by Myramyd »

jkokura

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Re: A/B Box
« Reply #5 on: August 29, 2011, 05:06:16 PM »
I would build the buffer in a separate box if I thought I might use it the other way around (1 to 2).

Jacob
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