I've been doing some more ACA/ASC research, and recently obtained these 1993 ACA sound testing photos from a friend. Needless to say, when I saw these my jaw dropped. The Alertronic fan in me just about lost it, and I knew I had to share these with you all. The photos depict various sirens undergoing sound testing at ACA's Mequon, Wisconsin facility in 1993. Sirens tested include the Performance Plus-Omni, the Alertronic 4000, the T-128, and most notably the Quadren. These tests were carried out to determine whether or not Hörmann wanted to purchase the company from B&N. Ultimately they did, forming American Signal Corporation, and from what I've gathered they decided against implementing the Tempest and Quadren into their product line. It is my thinking that Jim and Dale took these designs with them to Excel Alerting Communicators, later reintroducing them to ASC when Dale bought the company back. As a side note, you can see various other items in the backrounds of many of these photographs, including a Thunderbeam, the Cyclone, some fiberglass moulds, and what could even be part of an Alertronic 5000! With that said, enjoy:























Christian Bricking, living in the Cincinnati Metropolitan Area.
Owner of a WPS-2804, Model L, and B9.
Certified Skywarn spotter since April 5, 2016.
