Marinco 12V Dual Trumpet Electric Horn [10029XLP]12V Dual Trumpet Electric Horn Marinco is the leading supplier of horns to the marine industry, with over fifty years of experience in designing and manufacturing sound devices specifically for use in harsh marine environments. Stainless steel is used for all critical components such as trumpets, motor cover, diaphragms, assembly and mounting hardware. In the case of the XLP trumpet horns, the horn is given extra protection through the complete over