I've owned a Walkabout Scout 12" for sometime and I'm quite happy with the tone and what-not, but I do have one question. When I play it at louder volumes, close to mid-way and up, when I hit a low string or lower note, it sounds almost like a helicopter with the notes breaking up. Not like the sound is going out, but it almost sounds like there's a delay on it. Is this because the low end frequency is pushing the speaker too hard?