Summary: I had a hard time deciding whether to buy this speaker with my D3X speaker or to just buy a second D3X. The bass from the D3X was already pretty decent. Overall, I think I would have preferred a second D3X. The bass from this DSX is decent, but the integration with the D3X is the issue. As one reviewer hinted, the integration of the two speakers isn't perfect. Basically, the DSX appears to be too much for the 3X.