I have the PB12-NSD as well and I like it. It's a touch boomy but I think a lot of that is my room. I have never bottomed or ever heard it have any issues and I have demoed it pretty hard from time to time. As far as I know all SVS is designed and built in North America, I know for sure the drivers are made in Ohio and the BASH amps in Canada, maybe the housings are made overseas, not sure.