Designed specifically to support the challenging and dynamic multi media environments in classrooms, the Audio Enhancement DEL SPK4 Advanced Ceiling Speaker is powered by Panasonic technology. It provides optimum performance for teacher voice reproduction. It features a ported enclosure which boosts the bass response of the speaker, while the four inch cone speaker provides enhanced high frequency response. BR BR Powered by Panasonic technology to optimize the sound performance Four inch cone speaker provides enhanced high frequency response Features a ported enclosure to boost the bass response of the speaker