Yes they do become fatiguing after a while which isn't the case with the new Ultra 13 or the sealed SVS subs. When I first challenged the sound quality of the ported SVS subs compared to the EP subs it created alot of controversy at other sites. But enough time has gone by that most folks have taken a more mature attitude about it. This old FR graph in particular comparing the EP600 with the then top of the line SVS Ultra caused alot of anguish for that companys marketing machine. The mid bass hump is quite noticeable and its even more accentuated in many rooms. The extension was nice but not a good tradeoff to that awful FR.



John