So my RMC 6 wah just totally crapped out. What does one do in a hurry? Well, I use a M9 for delay/chrous/reverb in my Maz 38 FX loop. The M9 is in no way attached to the front end of the amp. Since I was in a pinch, I dialed in an auto-wah thing. Note that I often run two or more dirt boxes up front. And the wah worked and sounded fine. Even as it sat in the FX loop.Even with an pretty healthy OD engaged. In fact I tried it later with the "Throaty" wah and an expression pedal. Works fine. In fact it causes far less noise than my "real wah!" WHO KNEW?