Hi all, it seems my WW Ultra has some kind of limiter in it. It kicks in when I crank the treble on my new MTD-535. It takes down the whole signal for about a second. Ouch. Good thing I discovered it here at home, and not in the middle of a gig. First I thought I was losing a speaker, it was that kind of a sound, like the coil was about ready to fry or something. But no, it was definitely from the amp. Does anyone know what's up with this? Is this protecting the power section, or is it in the preamp?