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Helix through FX return from JCM900 not workingHi all, Until now I used my helix through the FX return from a Lab L9 (solid state). Sounds great and works fine. However, if I connect the helix with my JCM900 in the same fashion, it does not make any sound, regardless how much I crank up the volume. Also, if I connect my guitar to the FX return of the JCM directly, there is no sound at all. If I connect the guitar to the regular input channels A or B, all works fine, so amp itself is ok. But when I connect the helix to either channel I need to crank up the volume considerably before it becomes audible and then also sounds mudded. Questions: - I would prefer using the FX return from the JCM as i do with the Lab L9. Is that doable? If so, how do I need to do that (if that is different than with the Lab L9)? - Do I need to increase the output signal from the helix? If so, how do I need to do that? - Do I need to increase sensitivity of the FX return? If so, how do I need to do that? - Or is it likely that the FX return from the JCM900 is broken, since I do not seem to get any sound from it even when directly connecting my guitar? NB I prefer not to use a 4cm method as I do not intend to use the pre-amps from the JCM. Thanks for your suggestions. Eric