Noob here. Sorry if this out of place.

Has there ever been a comparison of budget powered subs? I've pretty much scoured the internet for such a thing, with no success. A shootout of the $200-500 powered subs. Such as the Rockville RBG18S 18" , Behringer B1800XP 3000W 18", Seismic Audio Tremor_18-PW, and the Sound Town METIS Series 2400 Watts 18.
I know there lots of much better, costlier options out there. And I also know one can buy better, used. But is there something other than Amazon reviews for these models, currently on the market?