FX Loop break up

Hi,
I have just started trying to use a TC electronics ditto looper and Zoom MS70CDR in the FX loop of the GM36. When bypassed (not true bypass unfortunately) the ms70 seems to break up my clean channel. Is the output of this pedal simply to high?

Has anyone else experienced unwanted noise in the FX loop?

Any help or ideas would be appreciated.

The GM36 is a gainy monster. Try cutting the gain down on the clean channel and bumping the volume. Also, if you`re using less than 36 watt mode for the clean channel, try bumping it up and readjusting (again, speaking of gain and volume). It should help. The loop sits between the preamp and power amp so even the tiniest clipping of the signal will be amplified, and your pedal output may in fact be a little hot, ever so slightly overdriving the signal. And if going full power on the clean channel brightens your tone up (it did mine), just a tiny, tiny twist of the volume knob on the guitar warms it right up without giving up responsiveness.