The Penetrator-50 (also known as the P-50) was introduced into ACA's lineup in 1980 as a replacement for the Hurricane 130 MKII, boasting incredible sound output without the need for a blower, which means the siren also requires less maintenance. The P-50 is unlike its brothers in that the P-50 shares a rotor and stator with the ACA Cyclone 120 and is essentially a Cyclone 120 flipped on its side with a rotator and projector attached. This meant the siren was exclusively 8/12-port dual tone and