Please ensure Javascript is enabled for purposes of website accessibility Jump to content

Recommended Posts

Can anyone elaborate on the Guitar Input Impedance setting on the Global Settings page?  Under Global Settings, Ins/Outs, Guitar Impedance, I've got it set to Auto. Does anyone know what this setting detects and how? 


I'm running a Sunrise Magnetic pickup and a LR Baggs iBeam transducer, both running into a LR Baggs iMix internal preamp, in my acoustic guitar.  I'm using a stereo Y-cable, running the Sunrise into the guitar input and the iBeam into the Aux input of the Helix.  I know the Sunrise pickup has an output of 2.0K - 2.2K Ohm output.  I'm not sure what the output is when running through the iMix preamp...searched online, can't find any specs on the iMix.











Link to comment
Share on other sites

I took this from the Owners Manual:
Helix includes an impedance circuit on its Guitar Input that affects tone and feel by loading your guitar's pickups as they would by an effect pedal or amplifier. A lower value will typically result in some high frequency attenuation, lower gain, and an overall "softer" feel. A higher value provides full frequency response, higher gain, and overall "tighter" feel. When set to "Auto", the Guitar Input's impedance is dynamically set to match the first amp or FX model on Path 1A.

It looks like it works the same as on the HD500X.

Link to comment
Share on other sites

Thanks DarellM5


The Sunrise is specifically designed to be a low-output best with their buffer box that boosts the output signal.  I guess I could get a similar result by placing a gain block as the first thing in the signal chain. I'll mess around with the impedance settings too.  Seems to me that the higher settings would give me "full frequency response, higher gain and overall tighter feel" I'm looking for.

Link to comment
Share on other sites

The input impedance should actually have less of an effect with things like active pickups and acoustic guitar preamps simply because you're not experience the same sort of loading you do with passive magnetic pickups. The level from an acoustic preamp is going to be pretty hot usually, so you may be better of just using the Helix's aux in, rather than the guitar in.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...