I got a little tired of people not noticing my small Miata on the road and not even taking a second glance when I honk my horn. With that, I installed Hella Horns Sharptone horns. These horns, while not the loudest have 2 tones and when paired scream at 115dB.
Most people have purchased the Super Tone Horn but for some reason, the Sharptones were on sale.
The main differences are that the Super Tone Horn screams at 118 dB and the tones are 300 / 375 /500 Hz while the Sharptone horns are at 115 dB and 415 / 350 Hz. From what I’ve seen online are videos showing (hearing) that the Super Tone is a little lower than the Sharptone. In the end, I’m glad I went with the Sharptone.
For the MX-5 ND, installing these horns is easy once you remove the front bumper. After watching many videos on the installation, when looking at the back, the negative is on the right.
Ok, moving onto power. I cut the positive going to the OEM horn, then added 2 wires to them and connected them to the positive side of each horn. There are 2 bolts behind the bumper where you can easily bolt on the horns.
The big question, “Where do I ground the horns?” My answer and what worked was to take a wire and connect it to the negative side of the horn and ground it to the bolt where I attached the horn.
I’m hoping to show this in a video but I did the install late at night and buttoned up the car quickly. For now, the main things are:
- Negative, when looking at it from the back is the one on the right.
- Ground it to the bolt.
- Splitting the positive to both horns works.
- Yes, I left the other OEM horn plugged in so I really have 3 horns.