Review on Piaa Slim Line 112Db Twin Tone Sports Horn Kit for All Vehicles - 400Hz and 500Hz, Black: Product Optimization by Scott Wallace

I bought this P1AA horn kit based on the great reviews on YouTube and other good reviews online. I haven't installed it yet but have tested it with the fully charged motorcycle battery I kept inside the Optimate 6 Smart Charger during the winter months. It's noisy! In fact, they sound just like the good car horns that were in cars from the 70's and before. I am going to replace the ridiculous "meep-meep" horn that was on my motorcycle which is like the horn that only sounds on a motorcycle and is utterly useless and so weak it would be embarrassing even to use it . Here is some information. This might be helpful for those who are thinking about buying these. A general concern is that aftermarket horns draw too much current, which can blow a fuse or damage the horn switch and cause sparking in the contacts. This is especially true for air horns, but they are not air horns. The usual way to solve this problem is to install a relay and wire harness so the horns work directly from the battery. However, the manufacturer of these horns claims that this is not necessary with this set. Also, there is a great video on youtube where a guy installs them on his bike without a relay and everything works great and he says he knows others who have had the same experience. But I decided to check everything myself. I contacted the manufacturer first, who answered incorrectly (but I don't think on purpose) that both horns draw 2.7 amps combined. In fact, the manufacturing specs say EACH speaker draws 2.7 amps, which is essentially what the Revain product description says as of this writing. But I tested them myself and to my surprise the horns I got actually draw less current than 2.7 amps each. I measured them with a high precision Fluke 28II DVOM and found that the 500Hz horn was only drawing 1.95A and the 400Hz horn was drawing 2.35A for a total of 4.3A. Of course these are just mine horns and someone else might get a different result. The crappy original horn that was on my bike draws 1.5 amps, so the new horn only draws 3.8 amps more than the old horn. That should work just fine. However, I can still install the relay harness just to know that the horns are getting maximum current and there's no chance of blowing a fuse since my horn is on the same fuse as my brake and turn signals. Again, I might not bother with the relay. I wire them without a relay and can always add a relay and harness if needed. The biggest issue with installing it on my Triumph Rocket III Touring is installation, but I think I found a way to do it.