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: 12WAmp Continuous RMS Power Rating: 10WImpedance (On VHF Output): 4 OhmsSensitivity (+/-3dB) 1W/1mtr on axis: 833dBFrequency Range: Limited to Human Vocal Range 300Hz to 4.5kHzMagnet Type: NdFeB (Neodymium Iron Boron)Cone Material: PolypropyleneCone Diameter: 59mm (2.5)