The Anchor Audio AN-130BP/HBM is a 2-way, magnetically shielded, portable P.A. speaker, with 30 Watts of amplification, serving the classroom, lecture and presentation markets. This speaker features independent front panel bass and treble controls, along with a volume knob. The rear panel is equipped with 1/4" Microphone and Instrument inputs, along with a pair of RCA line level connectors. The Carbon Fiber woofer is covered by a protective metal grill and the power supply is internally switchable for international use.