I haven't followed that type of speaker, but Definitive Technology has several models of that type and people post about those now and then. IMO they are more powered woofers than true subs, tho; I'd just rather have more capable subs. Might search some of the threads here or at avsforum.com for how people have set them up, or even get SVS back on the horn and ask them too. What models do you have? One thing I do remember, particularly for DefTec, was a fairly high number of folk mentioning amp failures for the powered section.