The 4112W is a powered full-range, two-way system designed for a wide variety of speech and music applications, such as clubs, churches, or concert settings. The 4112W is a Modular System. While it is sold and shipped as a Powered Product it can also be purchased without the amplifier to be upgraded later. The Amplifier is a revolutionary 400 watt “transformerless” amp that is optimized for each cabinet in the Series 4000. It weighs less than 3 lbs. The cabinet design uses a 13 ply 3/4” (18mm) high quality baltic birch plywood with dado joints, recessed baffle and a 16 gauge front perforated grill for long lasting durability. The baffle is cut from 1’’ MDF to enhance acoustical properties and to give the components a rigid interface. While it is shipped standard in Duracoat Black it is also available in white and natural birch finish. The two-way cabinet is loaded with a 12’’ cast aluminum low frequency driver and a 1’’ titanium high frequency compression driver. The titanium high frequency driver is coupled with a durable ABS horn for proper dispersion. The cabinet is tuned by means of a vented port set at the optimum frequency. The 4000 Series features our exclusive “OPC” system (patent pending) with LED indicators mounted on the baffle. A green LED which lights when there is signal present - and a red LED which lights when the OPC (overload protection circuitry) senses an overload condition in the HF driver. The OPC turns down (-10dB) the HF driver temporarily, and the red LED flashes, indicating an overload. When the HF driver cools, or the power is decreased, the OPC automatically resets itself and signal is restored to the HF drive.