Pretty damn good down to 30Hz. Lots of cabin gain down there. You probably have the speaker cabinet tuned for 30Hz to 40Hz, so I wouldn't expect much below that even with boost. But then again, even if the system were hitting hard below 30Hz, the meter response is probably way down at that low frequency.Now that I think about it, this is all academic. That 2226 is excellent, definitely better quality than most of the boom-boom subs in cars. And at 600 watts capacity, even though it's tuned for 40Hz, I kinda doubt you're lacking for bass. Better be careful with your windows!