Nominal diameter

•  1" / 25,4mm (2)
•  1,4" (36mm) (2)
•  3" (70mm) (2)
•  4" (100mm) (2)
•  6,5" (165mm) (3)
•  10" (250mm) (4)
•  12" (300mm) (2)

Nominal impedance

•  4 Ohm (2)
•  8 Ohm (3)