Thought this looked very interesting but the Monoprice 9723 beats it pretty handily, for < 1/2 the cost.
Price aside, the SVS SB12-NSD is a generation behind but a model above the SVS SB-1000 which your linked AVS forum comparison mentioned provides better clarity, punch, and volume than the Monoprice 9723. Unrealistic to compare a $112 sub versus one that a few years ago retailed for $649. Not saying the 9723 is crap because I'm a repeat Monoprice customer (for bits and pieces).
In general I find AVS and audioholics good references for low to mid-fi gear suited for newbies. Trying to connect reviews from two different sources can be full of apples and oranges comparative problems.