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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
LOUD horn installation
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<blockquote data-quote="Fred W" data-source="post: 1198959" data-attributes="member: 3828"><p>You really can't trust the "dB" rating of horns since the measurement is affected greatly by the way it is measured. So one manufacturers 110 dB rated horn is not the same loudness as another's</p><p></p><p>I have an SPL (Sound Pressure Level) meter and, several years ago, made comparative measurements of a single PIAA 500Hz Slimline horn compared to each of the two stock horns on my 1st Gen FJR.</p><p></p><p>I do not have the exact results handy, but the PIAA most definitely produced a higher dB level than the stock ones. The high tone horn was very wimpy and the lower tone stock horn produced something just less than the PIAA. But remember that dB is a log scale. An increase of 3dB is double the sound power, but it will not sound twice as loud.</p><p></p><p>I ended up using the 500Hz Slimline in lieu of the wimpy high tone, along with the stock lower tone, and the results were an appreciable improvement in horn loudness.</p><p></p><p>The stock 2014 single horn is pathetically weak. I will be at least adding a supplemental horn, maybe just replacing it with a new pair.</p><p></p><p>I'll need to check the wire gauge, but I assume that the stock harness is the same as prior gens and will support running two of the PIAAs in parallel.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1198959, member: 3828"] You really can't trust the "dB" rating of horns since the measurement is affected greatly by the way it is measured. So one manufacturers 110 dB rated horn is not the same loudness as another's I have an SPL (Sound Pressure Level) meter and, several years ago, made comparative measurements of a single PIAA 500Hz Slimline horn compared to each of the two stock horns on my 1st Gen FJR. I do not have the exact results handy, but the PIAA most definitely produced a higher dB level than the stock ones. The high tone horn was very wimpy and the lower tone stock horn produced something just less than the PIAA. But remember that dB is a log scale. An increase of 3dB is double the sound power, but it will not sound twice as loud. I ended up using the 500Hz Slimline in lieu of the wimpy high tone, along with the stock lower tone, and the results were an appreciable improvement in horn loudness. The stock 2014 single horn is pathetically weak. I will be at least adding a supplemental horn, maybe just replacing it with a new pair. I'll need to check the wire gauge, but I assume that the stock harness is the same as prior gens and will support running two of the PIAAs in parallel. [/QUOTE]
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LOUD horn installation
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