SFD516
Member
Unitrol UTM-4 had the factory option to make it a dual unit, this is my UTM-4 with that option the secondary amp. is an 80K, when ever you hit wail or hi-lo in Pos. 3 it will activate both sirens, same as dual 80k or Dual Omega siren set ups. Very effective siren as one amp can stay in wail as the other performs sweep(lets you keep your hands on the wheel).