VHF Extension Speakers Surface Mount. Part Number MB-41B. A stand-alone 4 VHF extension speaker that's completely waterproof, with stainless steel grill and mounting bracket, ABS housing and polypropylene cone. 10W Maximum Power Handling. Comes equipped with a 10' lead wire and mini-plug. Features. Completely waterproof and corrosion-proof. Features stainless steel grills, sturdy plastic frames, polypropylene speaker cones and teflon-coated wires. Ideal for use as a VHF remote. Available in black or white color speaker. Specifications. Peak Power Handling 20W/pair. Speaker Impedance 4 ohm. Frequency Range 1K to 10K Hz. Weight 1.05 lbs per Speaker. SPL 83 dB /-3 dB. Overall Dimensions 2 x 2' x 1 74mm x 69mm x 33mm Part Number MB-41B. A stand-alone 4 VHF extension speaker that's completely waterproof, with stain Features stainless steel grills, sturdy plastic frames, polypropylene speaker cones and teflon-coate Peak Power Handling 20W/pair Speaker Impedance 4 ohm Frequency Range 1K to 10K Hz