I did a search, but it couldn't answer my question, so here it goes...I just was at my local music store and noticed that they had a SVT-CL head (USA made) tagged at $999. This head is technically new (never bought), but has been sitting around in the closet and sales floor for a year or two. They told me they'd give me a good deal on it, so I took it home for the weekend to try with my SVT410HLF cab. That was the good part... ...when I got home and set up the rig, I plugged in my Yamaha BB415. As the voulme went up I heard farting coming from the cab (and me ). The EQ was set flat, hi/lo buttons out, and gain at 10-11:00. I seemed to notice farting even with the tweeter off, but it was at its worst with the tweeter on. It got worse the more I dug in with a pick on my B string. Any advice or thoughts on what I'm doing wrong and how to fix this? Is this a tube amp thing? I never had this problem with my LMII. Thanks.