I am considering getting a mixer for band practice. The model I'm looking at (Zoom L-12) has 5 individual submixes meant to be used as headphone monitoring outputs.

What has struck me when I looked at it, was the possibility to reroute the submix back into the mixer again. An example connection could look like this:

enter image description here

The path could work like this:

  • Blue: dry guitar signal using High-Z input
  • Orange: dry guitar signal again, from the A submix to e.g. amp modeler
  • Green: wet guitar signal
  • Red: actual main mix

What this gives me is e.g. ability to mix dry/wet guitar signal in main mix, record the dry signal for reamping etc.

Is there anything that would prevent this from working? I know that master outputs can't be used that way because they could form an infinite loop that amplifies the signal, but in this case I could mix that so that the A submix doesn't receive the track 2 at all (to avoid the feedback loop specifically).

  • This video seems to be showing exactly the thing I'm after, but I'd still like a confirmation and some tips. Mar 1, 2019 at 11:27
  • Pretty sure i used to do similar about 25 yrs ago. Nothing's going to go bang, just keep the volumes down as you try it.
    – Tim
    Mar 1, 2019 at 11:31
  • 1
    Just don't turn your aux send up on the channel that has the return. Unless you are going for feedback. ;)
    – b3ko
    Mar 1, 2019 at 13:52
  • As other commenters have noted, just watch the levels. Treat the dry guitar as you would a guitar or microphone, and treat the "wet" guitar as you would a line level device.
    – Duston
    Mar 1, 2019 at 15:09
  • I don't see how the levels alone would generate feedback in this set up. As long as the signal is routed correctly, there shouldn't be a problem with feedback.
    – Peter
    Mar 1, 2019 at 22:32

1 Answer 1


This should be possible, but I see one potential problem:

The signal coming out of Phone 1 will not be high impedance (Hi-Z). So if you are sending it to a guitar effects unit or amp, you may not sound the same as plugging the guitar in directly.

A more traditional way to do this would be to utilize a DI box. In that case, you plug the guitar into the DI box, send the XLR-out on the DI box to channel 1 on the mixer, send the Thru-out on the DI box to your effects, and send the effected sound into channel 2 on your mixer. This way you can still mix the wet/dry levels while still matching impedances.

  • That's a good point. That's what I actually wanted to do, albeit having a dibox integrated in the fx unit makes it even simpler. That was just one example, though, this idea could be applied to any other signal as well. Mar 2, 2019 at 6:49

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