The Bogen WV250 Wall Mount Power Vector Modular Input Amplifier 250W with 8 module bays for a wide array of inputs and outputs. Modules are available for signal processing and inputs such as: balanced and unbalanced inputs; stereo or mono; telephone systems/PBXs; transformer-isolated; microphones; tone generator; and bridging. The Power Vector automatically senses each module and inserts it into the signal path. A 5-position barrier strip allows for 4/8ohm or 25/70V output loads. Wall mounting is simplified with flush and surface options (sold separately) while a thermally controlled 3-speed fan will keep your amp operating at full power. When you need an amplifier with flexibility and reliability, the Wall Mount Power Vector WV250 is the obvious choice.