Roemtech PMA245+HMB Plenum Rated Amplifier + External HummBuster Kit
Kit includes one PMA-245 Plenum Rated Amplifier and one HMB-200 External Hummbuster
The PMA-245 is a dual input, 18 volt, 45 watt, plenum rated stereo amplifier/mixer. It is ideal for above ceiling applications. The PMA-245 delivers a true 45 watts of power and will give even the largest classrooms the audio clarity needed. In many environments, ambient background noise such as HVAC systems and hallway traffic is an issue. With the PMA-245, these issues won't overpower your sound system.
The HMB-200 HummBuster has been engineered to remove ground loop issues from classroom audio systems. This issue typically manifests itself as a hum or a buzz within the audio system.