Electro-Voice EVS12SB Replacement Woffer for EVSB 122 sub speaker
It's a genuine EV driver, EV make very good sounding speakers and so there should be no problems.
Hat's off to Thomann once again, they actually had the unit in stock, processing and delivery took only two days. I have used Thomann for many years and I will keep coming back when I need something. Great company to deal with.