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Stereo to mono summing cable

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Re: Stereo to mono summing cable

Postby bikefreeek » Tue Nov 06, 2018 8:20 pm

I know this thread/topic has been a little dormant, but I have a question for it that I hope that some of you will be able to help out with.

Is it necessary to sum going from dual mono to mono?

I'm specifically interested in the headphone out from most korg volcas, which are dual mono, to a single channel on a mixer. I've found affordable TRS 1/8" to TS 1/4" cables that would do the job, but do not have the resistors in a stereo to mono summing cable. My guess is that a stereo to mono summing cable is not needed, but I would love some assurance. Thanks!
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Re: Stereo to mono summing cable

Postby Martin Walker » Tue Nov 06, 2018 9:18 pm

Hi bikefreeek, and welcome to the SOS Forums! 8-)

bikefreeek wrote:I know this thread/topic has been a little dormant, but I have a question for it that I hope that some of you will be able to help out with.

Is it necessary to sum going from dual mono to mono?

I'm specifically interested in the headphone out from most korg volcas, which are dual mono, to a single channel on a mixer. I've found affordable TRS 1/8" to TS 1/4" cables that would do the job, but do not have the resistors in a stereo to mono summing cable. My guess is that a stereo to mono summing cable is not needed, but I would love some assurance. Thanks!

I can hopefully reassure you that no resistors will be required. Invariably a dual mono output of this type is for headphone use, and since both L and R signals will be identical it's highly likely that they will simply be connected to exactly the same point in the circuit.

In other words, they will already be connected together, so no summing is required ;)


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Re: Stereo to mono summing cable

Postby Sam Spoons » Tue Nov 06, 2018 10:35 pm

And if you decide you want to do the same with a stereo source (iPad/iPhone or WHY) Jon at Orchid Electronics made me a TRSmini to TS ¼" summing lead for less than a tenner.

http://orchid-electronics.co.uk
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