The M2000-LP masking speaker assembly is designed to accurately reproduce the required spectrum of masking signal into small plenum spaces. The innovative square enclosure ensures accurate sound masking frequency response. Specially designed 2" x 4" cone loudspeakers (2) are included in the package. A high efficiency 70.7V internal transformer is coupled to an external tap selector switch for easy system tuning. To meet most any local code requirement, the M2000-LP includes an innovative cover containing both knockouts and a strain relief. This system will allow the use of rigid or flexible conduit (if required) and easily accommodates "through" connections on the removable plate. UL 2043 listed for use in air handling spaces.