Voodoo Lab

I have a GCX with a piezo/magnetic pickup equipped guitar and I want to use the setup shown here

http://www.voodoolab.com/gcxdiagrams/12 ... ar_Rig.pdf

I'm wondering what kind of "mixer" I should get that is shown on this diagram.

Hi ilovewasabi,

I have been working on a similar problem with my rig - one line-level source and one instrument level source. The only difference is that my line level source is a MicroKORG instead of the piezo pickup.

Please note that I haven't tried this setup yet, but I believe something similar should work for you....

Mixer: Soundcraft Compact 4
Impedance converter: Radial ProRMP

Guitar > Instrument Input of C4
MicroKORG > Line Input of C4

Output from C4 > Radial ProRMP

Radial ProRMP > next loop

The reason for using the Radial ProRMP is that the output from a mixer will be at line level, and I want to use instrument level guitar FX after it... I will experience problems if I do not alter the level due to the reasons below;

Line level is much higher than instrument level, and will overload the inputs of the guitar FX if the signal is not attenuated, resulting in distortion.

The output of a mixer is likely to be very low impedance (75 ohms for the C4), but guitar effects like to "see" an impedance much higher. Miss-matched impedances in your system will result in a muddy, dull sounding guitar, not what you want if you've gone to the expense of buying a nice rack rig...

So, the ProRMP is designed to perform 2 operations;
1) reduce the signal level back to instrument level
2) increase the impedance to "guitar level" so your pedals think they are seeing a guitar, not a mixer.

Please note that this particular setup only applies if you are running stomp-box type FX after your mixer - if you are using rack-mounted units, they are more likely to accept line-level inputs.

The ProRMP is useful whenever you are sending Line-level signals to something desinged for a guitar to plug directly into. (stomp boxes, guitar amps, etc...)

I hope this was useful, and not confusing.

Jon

I checked out the Soundcraft but it seems as though it has been discontinued. I'm probably going to settle for the Startouch ST-2. It's a simple device that does what I want. I'll just hook up the magnetic pickups to A and Piezo to B and my amp to the In/Out. http://www.startouchpedals.com/Merchant ... ory_Code=5

yeah, that unit looks pretty simple (that's a good thing!).

looks ideal for your application... I might look in to it too!

hi man. I would recommend you the new Parallel M from Lehle! got already a batch of them and they are absolutely brilliant.

ilovewasabi wrote:I checked out the Soundcraft but it seems as though it has been discontinued. I'm probably going to settle for the Startouch ST-2. It's a simple device that does what I want. I'll just hook up the magnetic pickups to A and Piezo to B and my amp to the In/Out. http://www.startouchpedals.com/Merchant ... ory_Code=5

+ 1 on the startouch.