The PB 04-P2L is a compact, active, digitally controllable line source with Beam Steering and Pan 2-Line technology in an attractive design, developed for high-quality speech and music transmissions. The PB 04-P2L features Pan Audio DSP and Pan 2-Line technology. With this technology, audio, control data and the power supply can be transmitted over two wires (2-wire) such as speaker cables or cables of an already existing 100V installation. A Central Control Unit (CCU) is required to feed the signals and the voltage.