I checked the volume, it is smaller than the recommended .66 cuft, with displacement and all, so I threw some fiberfill to make it "bigger" as I have learned. I also heard I need the fiberfill in the box to help with fiberglass "rattling" resonating, don't know how legit that is.
But no I don't have an oscope, but I did do the 3/4 way up deal, and then set the amp before I ever heard clipping, so I doubt it could be that, also no clipping light. That is the one thing I have been pretty conservative with is the volume button, I do not want to clip ever.