So I've been using these 2x10 Fender Rumble cabs for some time now, and they seemed prone to clicking, clacking, and popping in the worse ways. Then I switched the tweeter on and viola! The nasty midrange frying pan noise from aggressive playing seemed to disappear. The overdrive breakup seems to taper a lot better with all my pedals too. I don't really understand how this makes sense. I guess the main speakers respond in a different manner when the tweeters are engaged?
