Looking for advice before purchase RSW-15

[TekkSki]

The guy selling the rsw-15 happen to be in NH?

Since I will not be buying it is only fair to post a link.
RSW-15 Wall shaker window breaker

 

[TekkSki]

I wanted to thank you all again for your help and thought I would follow up. I built a 2x2x2 ported box with a Dayton 18" HO driver. Safe to say that I am absolutely thrilled with the results. Decaf White Clouds makes the whole upstairs floor feel like a foot massager! My understanding is that this guy should be performing roughly like the PB13 Ultra for comparison sake. (Maybe better? but i'm biased) I have well under half of the PB13 invested obviously.

I'm 6ft and this thing makes me look small:

She is not painted yet but for now I'm just enjoying the bass:

 

[BoredSysAdmin]

I wanted to thank you all again for your help and thought I would follow up. I built a 2x2x2 ported box with a Dayton 18" HO driver. Safe to say that I am absolutely thrilled with the results. Decaf White Clouds makes the whole upstairs floor feel like a foot massager! My understanding is that this guy should be performing roughly like the PB13 Ultra for comparison sake. (Maybe better? but i'm biased) I have well under half of the PB13 invested obviously.

I'm 6ft and this thing makes me look small:


She is not painted yet but for now I'm just enjoying the bass:

Nice build!
Would you be able to share the sub ISD model you based the box on?
I seen it modeled in 2' cube sealed, but not ported