Audac LINO4 Column Speaker - 4" x 2 (White)The LINO series are column speaker series designed for a wide variation of general purpose applications in acoustic difficult environments, ranging from speech and announcement applications to background music systems. Typical applications are houses of worship, auditoria, presentation rooms, public transportation hubs, and many more. They are solid constructed using solid aluminum materials and finished through a rigid finely perforated front grill.