MartinLogan Grotto i subwoofer

Even at a modest $1095, the Grotto is one of the finest subwoofers we’ve ever heard, at least until we strapped a pair of the big ML Descents to the new CLXs. Very flexible, the Grotto allowed us to play with low pass settings, output levels and phase until we could integrate it with almost any pair of speakers. We concluded that “it may be all the subwoofer you ever need.”