I don't know the exact working either, I just know it is out there and there are reports from those that have one that it has helped with that slam feeling. I know I had LOTS of slam with the M80s and A1400, oh how I want one...........
Just to add, I know many are looking for that slam like in a bar, if you look at the specs of those pro speakers many only play into the 30-40 hz range with a bit of a boost in the mid bass range (60-90hz) which gives them that slam(along with oooddlles of power) and believe it is a sub doing the job, but it is not. I also know there are some pro subs out there spec'd for this slam range as well.
The graphs of the PB12-NSD has a bit of a boost in the 50-60hz range, (I had one briefly but didn't like the thump it had) but your room could be killing that frequency and Chris has nicely pointed out it looks to be the case.
Last edited by jakewash; 11/18/09 05:54 PM. Reason: Added more info.
