Originally Posted by panzer
thanks for info, but I am a novice and don't really know that means, I would still like to know what the defference would be, thanks
Dual SB12-NSD will have more mid/upper bass slam/impact than a single PB12-NSD.
A single PB12-NSD will extend deeper and will have more clean output at the very deepest frequencies (18-25 Hz).
Which option is best for you really depends on your particular application (room size, listening preferences, and overall playback level).