For what it's worth, I have a pair of undersea sws8xi subs in their original boxes .....these are the 2 ohms.....used for less than a month...purchased from amazon 2 months ago. (proof with amazon receipt)
Oh...and I have the spacers and connectors too.
It's hits hard...the wife doesn't want it...so it's got a go.
Just in case if anyone is interested....