Rotational Outdoor Electronic Speaker Array Outdoor Electronic Speaker Array Created: 1983 Price: $15,000 Description: RTCA's first of two attempts to create an electronic siren, the other being the Stacalert. This siren was not as popular as RTCA's other traditional electromechanical ones, despite being revolutionary for its time. It was made to compete with Whelen's WS-2000. A rotational variant was created too, similar to the WS-2000R.
