Have had mine for 3 days now, and WOW..... these things are LOUD! =) The bass is super-hefty. Almost too loud for my tastes, only because with the dial on the control-unit turned to as low as it possibly can go, and my bass settings @ 50% in my sound card drivers, it's still plenty loud enough to send significant vibrations into the adjacent rooms and keep people awake. Which I realize is probably a good thing for many prospective buyers =)
But with that said, these still are an amazingly kickass deal, specially for $60 AR. Listening to a techno song right now (not my typical music of choice, but wanna give these things a workout), and these things just thump and sound great, and they volume is "maybe" at 1/3, probably closer to 1/4 of max. Highly Recommended.