Voodoo Lab GCX True Bypass 8-Loop Rackmount Audio Switcher

Guitar Audio Switcher with 8 Audio Loops and Phantom Power
Voodoo Lab GCX True Bypass 8-Loop Rackmount Audio Switcher image 1
Voodoo Lab GCX True Bypass 8-Loop Rackmount Audio Switcher image 1

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Voodoo Lab GCX True Bypass 8-Loop Rackmount Audio Switcher
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Digital Music Ground Control & Module

GCX provides 8 audio loops. Loops are implemented with relays for absolutely no signal coloration. High grade relays are used which feature bifurcated gold contacts and are sealed in nitrogen filled enclosures. This insures maximum reliability and no degradation of audio performance over time.

Each audio loop can also be used as a latched or momentary switch. This allows control of footswitch functions such as amplifier channel switching and bypasses on non-MIDI effects. GCX will phantom power Ground Control via a standard 5-wire MIDI cable.

Also included are two 1/4 inch feed-thrus (front to back) with in-line unity gain buffer amplifiers. These exceptionally transparent buffers feature a 1 megohm input impedance to optimize guitar pickup tonal quality while providing many other benefits such as no signal degradation, greatly attenuated switching noise, and no "squealing" when switching between Preamps.

Additional Media

GCX User Manual

Tech Specs

Type Guitar Audio Switcher
Height 1.75"
Width 19"
Manufacturer Part Number GX

Customer Reviews

Based on 9 reviews
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GCX Guitar Audio Switcher

Used these for several years, and I just can't beat the flexibility of the GCX coupled with the GCP (Ground Control Pro). It gives me one-step access to tone combinations utilizing classic stomp-boxes and modern digital multi-effects processors. Managing multiple guitar effects really doesn't get much better than this.
Music background: Guitarist for Black Sheep Brothers

Voodoo Labs GCX Switcher

This does what is advertised. It responds quickly to midi messages for on and for off. It is sonically transparent. I did side by side comparisons with gear that I own that already have "true bypass" by daisy chaining them in bypass mode, or by looping them through the GCX bypassed, and there was no audible difference. I read online that there might be a mod to turn each of the 8 loops into stereo loops, and I would like more info on that - because 8 loops is not enough for me and I don't want another backspace to be used up for another switcher!
Music background: Hobbyist

Amazing for Pedals - GCX and GCP Review

I need to start this review by saying that I am not a effects/rack guitar player. I use 8 effects with this unit, but the real reason I bought it was to be able to preset combinations of pedals. I had a regular pedal board and was playing behind a well known artist when I heard about GCX. I was skeptical at first but after watching the videos and emailing VL a bunch of times I bought one. Now I'm sold on the idea. The main reason I bought it is because it allowed me to step on one button and have three pedals come on and hit it again and have them all go off - very useful if you're reproducing album tracks and are not a tap dancer. The things I have come to love about it (and I hope to clear up people's questions) are: 1- With GCP the top 8 buttons can act just like 8 pedals on a board 2- The lower 4 buttons can be presets of any combinations (and they can be named). You use the bank up/down to go to 4 more presets. So if you're on tour and play the same set every night you just put 4 presets in and name them the song title and have the intro, bridge, chorus, solo on 1234. Hit bank up and be all set for the next song. If you want to add/remove an effect while in a preset hust hit one of the top 8 buttons just like you would on a pedal board. Simple. 3- Programming is simple - just set the combination, hold sown edit and go through the menu and hit save. Simple. 4- Has a great buffer in it. Everyone talks True Bypass but honestly on a big stage the buffer sounds great (long cable). You can run it without the buffer as well. 5- QUIET - I thought my regular board was quiet this is unreal. No hums, etc... much quieter can't believe it. With 8 tb pedals hooked together that's a lot of extra cable. This just goes through the pedals that are turned on. Not sure why but it will clean up your sound. 6- Cabling will cost you some money. It's too bad they dont have the in/out switchable wired inside. You need an extra cable on every channel. Use Georgle L so you can make them an inch long. 7- Security - I never thought of this when I bought it but some pedals are expensive. I use the Klon which costs over a grand now (was $240 when I bought it), Boss CE-1, original Tube Screamer and a Slow Gear. I did a bar band gig with a friend as a fill in and all my pedals were in the rack and no yahoo could see/steal them plus they're not getting stepped on (you leave them on all the time) so they're in great condition. IN CLOSING - The GCX is a killer system for anyone who plays a lot. Things to figure in are cabling cost (you'll need about 50 connectors and I bought the 50' roll of cable - all George L), cost of a rack case (I am using a 4 space case as I use a Chandler analog delay, the GCX and shelf and I have to push my pedals down to slide it out so figure 3 free spaces for a shelf to work with clearance, and an SKP shelf - expensive but well made. Also - at first I hooked this up and sliding the shelf would pull things out, things were getting caught up, etc... so I redid it with cable ties and added length to some pedals now it's fine but you're looking as 3+ hours to get it wired up and sliding out as it should. Make sire you do it somewhere that allows you to access both sides of the case and where you can check cable lengths/clearance before you cut. Buy a package of small cable ties as well. DISCLAIMER - There are other ways to use the system. This is how I am using it.

A must have....

This is an absolute must have if you are an effects junkie.For those that dont know what this thing does is it has 8 loops in the rear.You can basically hook up 8 pedals or 8 effect processors,or basically 8 of anything into it.Lets say you got a song that requires a flanger,chorus,delay and another effect to be turned on for part of a song,and then turned off at a different part of the song.Without it you would be tap dancing to turn stuff on and off,with the GCX you click 1 button and BAM,all on or off,or any combination you want!! Voodoo Lab support is insane also,I have posted on their forum and got an answer from voodoo lab in minutes before!! I have 2 GCX,you cant go wrong with anything from Voodoo!!
Music background: Semi-Pro

Must Have

A long time ago, I had a dream about this unit then years later they invented it. If you have a rack of effects and a lot of old and new things you want to insert into you sound, but are afraid of the crazy chain of noise and mess, the GCX is for you. .. it just does exactly what it needs to, without a bunch of programming needed. Very clean sound and perfectly laid out so you can do almost anything you need to do with your live switching.
Music background: Guitarist
See also: Footswitches, Voodoo Lab, Voodoo Lab Footswitch / Selector Pedals, Voodoo Lab Rackmount Guitar Effects