The HYF-5A Speaker System is a pair of 5.25” powered two-way speakers designed for indoor wall mounting. The active speaker accepts a line-level stereo input, and amplifies it using a built-in amplifier and outputs a speaker signal to the passive speaker. Designed for professional, commercial, or residential applications where sound is needed. The speakers are enclosed in an ABS cabinets and can be mounted vertically or horizontally. The full-motion mounting brackets are made of hardened steel that attach to each speaker, letting you rotate each speaker to the left or right. The HYF-5A Speaker System features three available inputs that can either be connected separately or connected simultaneously to form a mix of the inputs. Power saving auto power on for energy-saving efficient operation. On the back of the active speaker, there is a mini panel that controls all functions of both speakers – including separate treble, bass and volume controls. Bass reflex for quality audio reproduction.