Early ATI controls

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Early ATI controls
Company Acoustic Technology, Inc.
Type Electronic Siren Controller

In the 90s(maybe early 2000s?) ATI used a controller with this style for their sirens. It isn't clear what the HPSS-R series used, but at the very least the old "DSA" style ATIs used this controller. This controller primarily consists of an amp set with 4 removable amps, and a main board that handles the radio, tones, and other functions. Information in this board is extremely limited.