Well no one "needs" a single 600, \:\) dual subs or multiple subs for that matter. The question really is whether you want to continue to make incremental improvements in bass reproduction throughout the room.


A single 600 has plenty of output and it holds in own against the best subs out there, but it is still a single sub which can be stressed depending on the demands of the soundtrack and room acoustics. I've tested its limits plenty of times with tracks like WoTW, Pulse, FOTP, M&C. Multiples are always better regardless whether your criteria is headroom, smooth FR, less distortion, or more detailed textured bass. However to realize those benefits takes time and patience experimenting with placement and controls. Once you get them dialled in though there is no going back to single subs even in the case of a fabulous sub like the 600.

It wasn't that long ago that my HT looked like this.




John