Help With 4CM Setup, Routing, Levels And Unity Gain.

[kingandsoraka]

Can anybody help me with the finer points of a 4CM setup?

I'm using a CAA OD100 and want to use the Helix for everything effect and switching related. 

I have it all set up, but when compared to my pedalboard being in the loop, the Helix setup is always louder. So much set that I'm setting the final output at -11dB to match the volume of nothing at all in the loop. 

Does this sound right? Am I supposed to be using the final output to match the levels or is there a better way/something I'm missing?

The OD100 has a line level loop and I have it set the following way...

Guitar to Helix in
Helix FX send 1 to Amp inpit
Amp FX send to Helix Return 1
Helix Send 3 (final output) to Amp FX return.

I have FX loop one set at instrument, for the amp input to see the right level and FX loop 3 at Line, for the FX return. Only issue I guess I can see there is that the amp's FX send is sending a line level signal, but I tried patching that into FX return 2 on the Helix, set to line level and it all seemed mega loud.

Common sense makes me think I need to isolate the amp's loop and make it see only line level signals, but having tried it by using three of the Helix's loops, I dunno what else to try?

I guess just dipping the level at output is an option but I'd prefer it to be totally unity somehow?

Any help would be great. 

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[VirtualGuitars]

This is how I have my two amps setup.  Obviously you can skip the 7-cable method if you only have one amp.  See attached.

 

4 Cable Method (4CM)

Cable #1 Guitar to Helix Guitar In

Cable #2 Helix FX Send Loop 1 to Amp #1 Main Input

Cable #3 Amp #1 FX Send Loop to Helix FX Return Loop 1

Cable #4 Helix 1/4" Left (mono) Out to Amp #1 FX Return Loop

 

7 Cable Method (7CM)

Cable #5 Helix FX Send Loop 2 to Amp #2 Main Input

Cable #6 Amp #2 FX Send Loop to Helix FX Return Loop 2

Cable #7 Helix 1/4" Right Out to Amp #2 FX Return Loop