JBL 4311B STUDIO MONITOR IN LATE 70'S

3 way speaker system developed as an object for the monitor in the control room which has a restraint in a space. Little clear distorted sound is reproduced in high efficiency.
Placement peculiar to this model of arranging a Woofer at the topmost part and putting an Attenuator on a lower is because it is designing supposing a hanging placement.

The thing of the diameter of 30cm is adopted as a Woofer, and adoption and a diameter [ of 3.6cm ] direct radiator are used for a squawker for the diameter of 13cm.