Alerting Communications of America (ACA) was a company that manufactured siren. It was founded in 1942, and was renamed American Signal Corp. in 1987.

Sirens made

The first siren manufactured by ACA was the Allertor series siren. A list of ACA sirens follows:

ACA Allertor 125, 130

ACA Screamer S-2, S-5, S-7, S-10

ACA Hurricane MK-I, MK-II, MK-III, MK-IV

ACA Banshee 110, 115, 120

ACA Soundmaster 115, 120

ACA/ASC Cyclone 120, 125

ACA Penetrator P-10, P-20 or ASC T-127, T-130

ACA/ASC P-30 (T-135)

ACA/ASC Alertronic (6000R,4000)

ACA Quadrant omni-directional electronic.

ACA Sentry 95

ACA Howler economical directional.

Of the above sirens, only the Cyclone,the Alertronic series, and the P-30 (now known as the ASC T-135) are still made today, and even these sirens are not as popular as they were when they were ACA. Also, the Quadrant was renamed the I~Force.

In the late 80's, the newly founded ASC planned the next generation of warning sirens, which included the cold war veterans such as the T-135, Alertronic, Quadrant, and Cyclone. The Penetrator was re-designed as the RM-127 & RM-130, until they were retired in early 2002.

The new sirens were given model numbers according to their decibal output. They are almost built entirely with stainless steel, although the traditional fiberglass method is still used on the Cyclone & T-135.

The list for the new sirens are as follows...
-T-112 (omni-directional)
-T-121 (omni-directional)
-T-128, T-132 (rotating)

The list for the new electronic sirens include:
-E~Class (Economical, multi-directional)
-I~Force (High output, omni directional)
Alertronic Models 1000, 2000, 3000, 4000, 5000, 6000, 7000, & 8000 (Basic, multi-directional)

The ASC factory and company is based in Milwaukee, Wisconsin.