I just picked up a Carver TFM-35, which is the first separate amplifier I've ever owned \m/, so I've been fooling around with different music and playing some tones. Well I gotta say that the low end performance has improved MASSIVELY, but there's a wierd issue I ran into. This mainly occurs with tones from 10Hz-30Hz. At a certain point in volume, the mids will start producing a fluttering noise, kinda like a jackhammer, instead of a smooth tone. If I turn the volume down or move up to a higher frequency, the fluttering will stop. Is this what an overdriven driver sounds like or is it something else? Also, the left speaker starts fluttering at lower volumes than the right. What might be the cause of that?