I've just about to replace four 2416 Diaphragms in some Sound Power Series 4716 European Cabs. One was blown and the other three all sounded different to each other. Distorted, low volume and lacking top end. Just wondering from the pics of one of the drivers if it's genuine. The top cap seems genuine with a date stamp of 88. I assume the date of manufacture 1988. The one in the pic is open circuit.