12V Chrome Plated Dual Trumpet Air Horn. The Marinco FullBlast compressor driven air horns are the loudest and most complete line of 12V air horns available. All of our air horns produce sound levels ranging between 120 and 127dB, which means all of our air horns meet the ABYC and NMMA regulations for boats up to 20 meters/66 feet.. Features: dB(A) Rating: 121 at one meter, 1/3 octave band. Fundamental Frequency: 375+/-15Hz, 315+/-15Hz.
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