The old strokers are a piece of art IMO. Loudest sub I've ever used when throwing less than 1500wrms at it. Very efficient sub, but just couldn't handle the power the Juggs and DD9500s could back in the day.Where stroker cones started to fold, new-school SPL subs walked away.
They're a bit of a double-edged sword. The bigger the box, the louder they got (at least in my setup). But the larger the box the more sloppy they sounded.
I still have my 18d2, **** thing is pretty much a collector's piece nowadays lol!