|
Room gain is going to affect every subwoofer. Sealed sub designs do tend to rely on it a bit. My sealed DVC 12 sub just didn't cut it for me, in my very large, open-floorplan living room. The Tempest with its lower resonant frequency and higher displacement would certainly fare better. But I don't know how much better.
When designing ported subs its actually smart to design in a little bit of rolloff in the bottom end to keep the low end from sounding exaggerated. You'll see this in the EBS alignments and Adire alignments in the Shiva and Tempest vented application white papers. The sims of your design look decidedly similar to the Adire alignment. We're talking about a low-Q vented alignment that is about as close as you can get to the transient performance of a sealed sub without giving up the port. And because of the low-Q design you don't get quite as much of the deep, deep, sub-20Hz bass as an EBS alignment. But you do get a naturally lower group delay.
The EBS alignment is actually a high-Q vented alignment where the tuning frequency is pushed so low that the group delay doesn't peak until you get down into the low-low frequencies (20Hz and below) that most people can only feel. The idea is its unlikely that your butt will register the higher group delay of the vibrations in your couch. So the EBS and the Adire alignments shoot for the same goals - low end extension and good transient response - but in very different ways. In my opinion, the the Adire alignment is really the best compromise you'll find between the typical ported sub and a sealed sub. In other words, if there is a halfway point ... this is it. If you can't decide between sealed and vented - try a low-Q vented.
|