I recently aquired a very strange blown 15 inch JBL that has a JBL factory label that says "2231H" " 8 ohm". The frames is a light grey, textured like the paint on a 2420 HF driver and the frame has a ferrite magnet. The blown cone kit was factory installed and had a foam surround. The cone is a bit heavier and stiffer than current 2235H kits. The frame and magnet are the same size as an early model 2225H that I have but the paint on the early 2225H is the same color grey but much smoother.
Did JBL ever make a 2231H with a ferrite magnet or has the label been changed?