Vhf Extension Speakers Flush Mount. Part Number: Ma-1000R. This Thin, Dual Cone Waterproof Communications Speaker With 20 Watts Of Power Is Ideal For Use As A Vhf Remote. Designed For Flush Mounting, It Fits Into A 4-?? Diameter Cutout. Comes Equipped With A Mini-Plug. Features. Completely Waterproof And Corrosion-Proof. Features Stainless Steel Grills, Sturdy Plastic Frames, Polypropylene Speaker Cones And Teflon-Coated Wires. Deal For Use As A Vhf Remote. Available In Black Or White Color Speaker. Specifications. Peak Power: 20W Each. Speaker Impedance: 4 Ohms. Cutout Diameter: 4-?Aãº" (110Mm). Overall Diameter: 515?Ns16''(151Mm). Mounting Depth: 1-?Aã±" (41Mm). Per Unit Weight: 0. 65 Lbs.