Originally Posted by Trimlock
I chose the box size because the OP wanted to downgrade, besides the price difference is only $50. The NSW 18" should be just a proven, I doubt they'd put the NSW tag on an 18" that only provides minimal effects. The SW will be more money than the NSW, the SW only modeled a bit better but should offer better everything for that cost.
The NSW also models well with smaller boxes, does very good in large boxes too. B&C and the NSW should offer a near indestructible design. Its just another option and I would think it foolish to not consider it considering it is a contender.
The 8ohm is the only downside I can see, its not really that big of a downside either.
oops, I thought there was an 18SW152, guess the SW and DS are the same price. Besides, the SW only models closely to the NSW, I'd anticipate it having a better low end. If it were between the DS and the NSW18 it looks pretty handily in the NSW based on the model unless you are really bothered by the 8ohm.
I thought it cost $630, $580 is closer. Last time I looked at the specs, they hadn’t released them yet.
The NSW’s higher fs didn’t look great either, but it seems to model fine.
It seems to me that the NSW is a direct competitor to the 18SW115, at $50 dollars more, and no 4ohm option. I wouldn’t chose it for those reasons, but its not enough reason not to consider it. I do like the “made in usa” part.
The DS is a stronger motor, made for small box or horn loading.
As to not proven, I haven’t seen reviews of anyone running one yet. I was slightly nervous buying the 21 as a new product, but at least ricci’s flogged one of those, and some people on the forum have been running them for some time.
Honestly, I rarely recommend the DS even though I own a pair. For most people, the performance of the Saf184.03 (8ohm) or TBW100 (4ohm) are close enough that the cost difference isn’t worth it to the higher end woofers.
The OP’s case is one of the few, where he’s trying to match 21ds performance from an 18 in a smaller box.
Since he wants the full displacement, the sw, ds, and nsw fall short anyway. The 18IPAL and BMS 18n862 are the only two I know of that can do it.