HELLA 012588011 Motorcycle Series Black 12V Disc Horn Kit (Universal Fit-Set/Box)

Nice and loud, don't need a relay as this run in parallel and hooks up to existing wiring

I installed these on an Evo Sportster. I wanted horns that were small enough to "hide" but still be loud enough. These little horns do the job. I mounted them low and tucked in between the frame downtubes. There is a mounting tab on the frame there in front of the engine crankcase and I installed them back to back on a single 2" long, 5/16" diameter bolt. Easy install and they blend in well.They are small horns that are 67mm or almost 2.75" in diameter. Each of the horns is tuned to a different pitch. Together they produce a bright, loud "European" tone. The sound is a bit obnoxious, but it will get noticed.I measured current draw and was a little over 3 amps for both at 12 volts. This means there should be no problem connecting them to most existing horn circuits. (No extra relay is needed)They say "water spray proof" and do have drain slots to get rid of any water. Time will tell how they last, but for the price, it seems hard to go wrong with them.

I have tried several sets of horns for my Triumph motorcycle that said no relay needed. They worked as I installed them but when I needed them only one honked and sounded like a sick goose. These horns worked perfectly without a relay and are much louder than the original single horn on my Triumph Trophy SE. I originally skipped these, going for the loudest claim without a relay and I should've started here.

decently loud, definitely louder than stock, tone is higher pitched, but sounds ok. good bang for the buck so far

These are the dual disc horns kit. Came with the horns and mounting brackets. According to several reviews of these horns, they worked without a relay, so I was willing to give them a try. They mounted perfectly using the bolts for my engine guards, and since they're not polarity-sensitive, it was easy to wire them up. I ran a couple of "Y" wires off the OEM wires to both horns, then tucked the wires up so they're out of sight. Pleased with the sound output of these horns, much louder than the single Hella disc horn, which in turn was louder than the OEM single disc horn.

The metal mounting point snapped after only a few months. Probably fine for road-only motorcycles but definitely doesn't last for adventure bikes. Decent horn otherwise, not terribly loud though.

Was riding my motorcycle and the horn didn't work. Pulled off the side over and low and behold, no horn. Where did it go? Somewhere in downtown Syracuse I would suspect. It had broken off since the mount was still in place. This was a simple mount and wire job. No mods needed. Easy to install. It's just barely louder than stock so take that for what it's worth. If you want loud, look elsewhere. A small horn will not deliver a big sound. Happy with it, it does what I need. It goes beep.

Pretty weak. After less than 1 year and not riding in the rain, both are totally dead. I tried a fresh 12v battery on the bench vs. a new horn I had - worked fine - both of these did nothing. I tried backing out the contact screw - and then back in - still nothing. Never had a mechanical horn fail this fast. I'm not usually one to dole out low-point reviews (check my history) but less than a year? C'mon! This design has been around for DECADES and every other vendor I've used, I've sold the vehicle before the horns failed.