I have owned the Sunfire True Subwoofer MKIV, True Subwoofer Signature, and True Subwoofer EQ Solitare as well as the Definitive Technology SuperCube Version I and Version II. I currently have the Definitive Technology SuperCube Reference in my system.
The two best of those listed, in my opinion and as you probably expect, are the Sunfire True Subwoofer Signature and the Definitive Technology SuperCube Reference. I prefer the SuperCube Reference because in my system it is more musical than the Sunfire. They are both serious bass beasts. The Sunfire acually had more output, but it was not as able to delineate bass notes as well as the SuperCube Reference. I find that the Definitive Tech SuperCubes in general are more musical than the comprable Sunfires.
You will not go wrong with either subwoofer. I tried other "audiophile" subwoofers in my system from REL and Velodyne and find that I prefer the more high output, compact subwoofer variety in my music system.
Good Luck.
The two best of those listed, in my opinion and as you probably expect, are the Sunfire True Subwoofer Signature and the Definitive Technology SuperCube Reference. I prefer the SuperCube Reference because in my system it is more musical than the Sunfire. They are both serious bass beasts. The Sunfire acually had more output, but it was not as able to delineate bass notes as well as the SuperCube Reference. I find that the Definitive Tech SuperCubes in general are more musical than the comprable Sunfires.
You will not go wrong with either subwoofer. I tried other "audiophile" subwoofers in my system from REL and Velodyne and find that I prefer the more high output, compact subwoofer variety in my music system.
Good Luck.