Designed for operation with Hall Research “VSA Series” room control systems, these speakers are perfect for unobtrusive appearance and easy installation in suspended ceiling applications. They are shipped ready to install and require no speaker cut-outs in the tile. The fully enclosed and protected driver is mounted to a fine perforated 2' x 2' square grille finished in white powder epoxy for long lasting appearance that blends perfectly and unobtrusively. Speakers include Five (5) seismic tie-off points and meet plenum requirements. No assembly required.