Output splitter câble

General discussion and tech talk about the industry standard Pedal Power line of power supplies.
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pascalgr
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Joined: Wed Feb 04, 2015 1:00 pm

Output splitter câble

Post by pascalgr » Wed Nov 16, 2016 10:45 am

Hi
I have bought an output splitter adapter
Is it normal that I have 9v on one of the output but on the output ground lifted I doesn't have 9v I can't measure voltage

Thanks
Pascal

JohnClark
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Joined: Tue May 05, 2009 2:33 pm
Location: The Lab

Re: Output splitter câble

Post by JohnClark » Wed Nov 16, 2016 11:54 am

Yes, this is normal. The side with the white stripe is ground lifted... only the + connection is made.

If you are using a Voltmeter to measure the two outputs you would put the Black probe into the center of the non lifted connector, then use the Red probe on the outer sleeve of each barrel to measure the output.

However, I doubt this is why you bought this cable ;) What pedals are you trying to power using this cable?

If you plug these two pedals in as follows...

1. Guitar to Pedal #1 Input.
2. Pedal #1 Output to Pedal #2 Input.
3. Pedal #2 Output to amplifier input.

Then connect them to the Pedal Power with the Output Splitter cable, you will most likely see that the pedals will both operate.

pascalgr
Posts: 13
Joined: Wed Feb 04, 2015 1:00 pm

Re: Output splitter câble

Post by pascalgr » Wed Nov 16, 2016 12:25 pm

I connect on the two output
TC polytune 2 and mxr univibe (the new model)
Is it better using the output power of the polytune or two output on voodoo lab power 2+?

JohnClark
Posts: 7131
Joined: Tue May 05, 2009 2:33 pm
Location: The Lab

Re: Output splitter câble

Post by JohnClark » Wed Nov 16, 2016 12:43 pm

Using two outputs is always best, this keeps everything isolated.

Using the Output Splitter will combine the pedals, however the lifted ground to one pedal should prevent any possible ground loop. This can still make noise with some pairings.

Using the Tuner's power output will combine the pedals with a common ground just like a typical daisy chain cable. This can make noise and cause ground a ground loop.

You should try whatever you like to find out if there is a problem with either way to power two pedals from a single output.

p.s. Are you saying that when you use the Output Splitter with the Poly Tune and the Uni-Vibe that something does not work? Do you have the audio cables connected as I mentioned earlier?

pascalgr
Posts: 13
Joined: Wed Feb 04, 2015 1:00 pm

Re: Output splitter câble

Post by pascalgr » Wed Nov 16, 2016 1:42 pm

I haven't connected yet the two pedals
I choose to connect these two pedals because their milliampere are the lowest of my pedals
I'll try this next day
The best solution to have no noise is a second pedal power ?

dbjeremiah
Posts: 1
Joined: Fri Jul 21, 2017 12:33 pm

Re: Output splitter câble

Post by dbjeremiah » Fri Jul 21, 2017 12:38 pm

I am having the same issue whether splitting 18v or 9v (currently using it for 2-18v pedals). Most of the time my pedal board will power up fine but sometimes only one pedal will power up (I am using strymon power supply and current is not even close to maxed out). I saw a post saying all pedals instrument cables must be connected before the power is applied, is that correct? Any help or suggestions you can give??? Thank you.

"Then connect them to the Pedal Power with the Output Splitter cable, you will most likely see that the pedals will both operate."

JohnClark
Posts: 7131
Joined: Tue May 05, 2009 2:33 pm
Location: The Lab

Re: Output splitter câble

Post by JohnClark » Mon Jul 24, 2017 9:26 am

Yes, all cables need to be connected before powering up.

Also, give each connection from the Output Splitter a quick twist once in a while to make a better contact.

I hope that helps!

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