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December 12, 2019, 07:53:38 PM

Author Topic: S.E.X 3.0 C4S, Balanced Output  (Read 799 times)

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Offline Gofspar

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S.E.X 3.0 C4S, Balanced Output
« on: December 04, 2017, 05:04:27 PM »
I just finished up, but I was wondering if anyone can give me a hand wiring my OT's for balanced operation, don't want to bork anything.
Visual aid would be amazing.
« Last Edit: December 04, 2017, 06:29:40 PM by Gofspar »

Offline JeffYoung

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #1 on: December 04, 2017, 11:24:47 PM »
Consider this only a potential visual aid.  Wait for confirmation from one of the Pauls that I got the wiring right.




Offline Paul Birkeland

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #2 on: December 05, 2017, 05:41:40 AM »
I just finished up, but I was wondering if anyone can give me a hand wiring my OT's for balanced operation, don't want to bork anything.
Visual aid would be amazing.
Do you want to use your SEX with headphones or speakers (or both)?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Gofspar

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #3 on: December 05, 2017, 10:29:09 AM »
Do you want to use your SEX with headphones or speakers (or both)?

I'd like to be able to use both.

Offline photoduo

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #4 on: December 05, 2017, 03:11:59 PM »
Do you want to use your SEX with headphones or speakers (or both)?

I would like to know the wiring for headphones only, I am eliminating speaker posts, the holes will be cooling vents.
« Last Edit: December 05, 2017, 03:17:11 PM by photoduo »

Offline Paul Birkeland

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #5 on: December 06, 2017, 05:19:16 AM »
For either case, I suppose I would recommend hogging out the hole for the 1/4" jack and going to a 4 pin XLR jack instead.  You simply need to wire the jack appropriately, which will split your grounds for you.  You'll want a pair of resistors for each channel to go from + to ground and - to ground.  These can just be 100 ohm resistors (wattage isn't important). 

Often times the 4 pin XLR jack has a ground tab.  Since the SEX is transformer coupled, it's completely OK to run all four of those resistors to the ground lug on the XLR jack since it's convenient.

One day there will be a 1/4" TRRS jack that will make this easier, but for now this would be my recommendation. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline photoduo

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #6 on: December 06, 2017, 06:21:21 AM »
You'll want a pair of resistors for each channel to go from + to ground and - to ground.  These can just be 100 ohm resistors (wattage isn't important). 

What is the purpose of these resistors?
Is it for signal transients?

Offline JeffYoung

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Re: S.E.X 3.0 C4S, Balanced Output
« Reply #7 on: December 06, 2017, 06:31:57 AM »
It's to reference each side to ground (0V) so that you get a + / - signal rather than a 0 / +.