Stereo Preamps with 1 power amp and rocktron all access

Q & A for building and interfacing your rack gear with Ground Control Pro and GCX-based systems.
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Moose67
Posts: 5
Joined: Sun Aug 02, 2020 9:28 am

Stereo Preamps with 1 power amp and rocktron all access

Post by Moose67 »

Total newbie to the switching world, is it possible to set up 3 stereo preamps running from 1 power amp,through the GCX switcher then control it all with the Rocktron All Access midi controller.
The set up I have is
Marshall 9100 power amp
Digitech 2120
Rocktron voodu Valve
Art sgx2000
I have looked at some of the set ups, but cant seem to find anything that matches what I need, or am i just to old school :lol:

Marlboro05
Posts: 266
Joined: Mon Sep 07, 2015 12:46 pm
Location: Australia

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Marlboro05 »

Hi there Moose,
To hook up your 3 preamps you’ll need somethingthat has 2 transformers to feed the preamps, I’ve just ordered a Radial Shotgun to do this and a mixer to go into after the preamps so you don’t have ground loops.
That is if you want to use them together, blended. If you wish to use the preamps separately, you can do it with just the GCX.

This is how you can do it with the GCX and each preamp by itself

http://www.voodoolab.com/gcxdiagrams/04 ... werAmp.pdf

Cheers Brett
GCPro, GCX, Pedal Power 2+, Pedal Power AC.
And some other stuff.

Moose67
Posts: 5
Joined: Sun Aug 02, 2020 9:28 am

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Moose67 »

Hi Brett
Thanks for the reply, i only want to switch between preamps so I'll give that a go see how i get on
Cheers Mark

Marlboro05
Posts: 266
Joined: Mon Sep 07, 2015 12:46 pm
Location: Australia

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Marlboro05 »

It’ll work for sure, you’ll get some good tones out of it🤘
GCPro, GCX, Pedal Power 2+, Pedal Power AC.
And some other stuff.

Moose67
Posts: 5
Joined: Sun Aug 02, 2020 9:28 am

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Moose67 »

Hi Bret
Well I'm getting there, I have managed to hook up 2 preamps, using the diagram, so I can switch between them, just have to figure out how to hook up the other one

Marlboro05
Posts: 266
Joined: Mon Sep 07, 2015 12:46 pm
Location: Australia

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Marlboro05 »

Hi there, you need a aby pedal or a splitter cable. I use a Radial ABY, as it has an isolator, phase invert and ground lift. But I use 2 or 3 preamps together. When my Radial Shotgun turns up, I’ll be able to run 4 at once🤘
GCPro, GCX, Pedal Power 2+, Pedal Power AC.
And some other stuff.

Moose67
Posts: 5
Joined: Sun Aug 02, 2020 9:28 am

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Moose67 »

Hi
Ok I've got 3 preamps working in the loops with a whirlwind multi selector, next question how can I get the Rocktron all access midi pedal to turn on 2 loops at once? Or is this not achievable? I've read both manuals twice still non the wiser :(

Marlboro05
Posts: 266
Joined: Mon Sep 07, 2015 12:46 pm
Location: Australia

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Marlboro05 »

Hi there,
Is this in a preset or via an instant access button? I haven’t played with an “All Access“ but I know with a “GC Pro” you can only do one Control Change per instant access.

I’d say it all depends on the mode etc that you have the All Access setup in to.

Cheers
GCPro, GCX, Pedal Power 2+, Pedal Power AC.
And some other stuff.

Moose67
Posts: 5
Joined: Sun Aug 02, 2020 9:28 am

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Moose67 »

Hi
Just figured it out, I have the all access in bank mode so first 5 buttons are presets, button 6-13 control the loops, it was just a case of remembering that I can programme the first 5 buttons to control the others, so it all works as I wanted now. Thanks for your help 👍👌

Marlboro05
Posts: 266
Joined: Mon Sep 07, 2015 12:46 pm
Location: Australia

Re: Stereo Preamps with 1 power amp and rocktron all access

Post by Marlboro05 »

Ahh, good stuff👌 Happy to help

Cheers
GCPro, GCX, Pedal Power 2+, Pedal Power AC.
And some other stuff.

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