For multiple speakers for your building, see our extensive line-up of product ranges at Proficient Audio Wall Speakers. These speakers are designed to give you the best in sound quality while maintaining the low visiblity. We have made standard in out ceiling mounted speakers. Our multi-room audio / video distribution systems and advanced music systems religiously follow basic impedance matching volume controls with slick remote keypads and touchscreens to select and control different audio / video sources in different rooms simutaneously.