Hi - I recently purchased a Boss RC-20XL Looper box and have it connected throughthe FX loop on my Vetta II.  The problem I'm having is I get a tremendous amount of noise (white noise, not hum) when the FX loop is connected yet the volume from the looper is very low.   I'm also not seeing the peak light on the input of the Looper blinking indicating a reasonable signal level even with the Instrument gain on the looper turned all the way up.

I have tried different cables - no difference.  The FX Loop settings are set as shown on page 4-16 of the Vetta manual (Amp1/L Send + Amp2/R Send set on max, Return Mix 50/50 and Return Gain 0%) Increasing the return gain raises the level of the recorded loop but the noise goes up as well.

When I plug my instrument directly into the looper and then the output into the Guitar input of the Amp I don't get the noise.  It would seem to me that if I could increase the send level to the RC-20XL from the Vetta that I could turn down the Instrument level on the RC-20XL and therefore reduce the amount of noise but I don't know how I can do this.  Another clue might be that I'm using mono TRS cables as the looper doesn't have stereo outputs.

Any help would be much appreciated.

Thanks!

Jim