HM100 is a low-frequency siren speaker kit, together with a 100W Siren, that will add a supplemental warning to an emergency response vehicle.

Please download the HM100 hammers manual for low-frequency amplifiers.
https://www.unitsignal.com/media/128/HM100%20Low%20Frequency%20Amplifier_2.pdf

The HM100 Amplifier comes equipped with two mounting brackets, which enable the unit to be mounted in a variety of positions. The unit has no user-operated controls on the amplifier, so it can be mounted underneath the seats, trunk, or in any other concealed area of a vehicle.