Active External VHF Speaker - BlackThe BAR-VA-1W (White) and BAR-VA-1B (Black) Active VHF extension speakers provide the loudest and clearest amplification of your VHF radio. A built-in 10W DSP amplifier actively removes sound that falls outside of the human vocal range to help you hear those vital communications. Each unit is adaptable to three mounting configurations - switching between Helm and Overhead Mount is achieved by just rotating the included mounting bracket - or removing the bracket altogether for super sleek flush mounting.Specifications: Ingress Protection: IPX6 (Currently testing for IP67 at time of printing) Amp Peak Power Rating: 12W Amp Continuous RMS Power Rating: 10W Impedance (On VHF Output): 4 Ohms Sensitivity (+/-3dB) 1W/1mtr on axis: 83 3dB Frequency Range: Limited to Human Vocal Range 300Hz to 4.5kHz Magnet Type: NdFeB (Neodymium Iron Boron) Cone Material: Polypropylene Cone Diameter: 59mm (2.5") Quick Guide (pdf)Brochure (pdf)