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From “E.Z.” (August 2015): “I have a working Stebel Nautilus Compact on my NT700VA. It sounds exactly like the Denali on your .mp3 file! UPDATE (August 2015): We initially mounted the horn shown in the photo at the beginning of this review and with the aluminum bar oriented as shown in the photos above.
Original equipment motorcycle horns are notoriously awful, with a wimpy “meeep-meeep” type being way too common. All of the Nautilus horns were mounted using a high-quality relay harness and each horn failed almost immediately. You can hear the sound of a dead Nautilus in the linked .mp3 sound file library below. Some motorcycles horn circuits are not capable of powering this 5 amp horn. If your horn circuits' max amperage is less than 5 amps, or if you are unsure, simply add our plug-n-play harness to bypass the horn circuit and draw power directly from your battery. Also, add our standard relay as this is not included with the horn harnesses. Product Specs
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It is recommended to not over tighten the bolt on the rear of the SoundBomb Mini. The horn should be secure, but should give way if rotated with pressure. Tighten the M6 nut to no more than 6.5 ft.-lbs. If the horn is too tight, it might not sound correctly.
But a webBikeWorld visitor who read the instructions more carefully than us (!) wrote to let us know we made a mistake. The Soundbomb (probably not the best name for a product here in our crazy 21st Century) looks nearly identical to the Nautilus Compact. At 113 decibels, the distinct low-tone sound from the DENALI SoundBomb Mini is over twice as loud as a typical 100 decibel disc horn.
The Denali™ SoundBomb was designed for those who want to be heard, but still want to maintain a stylish look. Securely attach the SoundBomb Mini to the chosen location on your motorcycle. Ensure that it is positioned in a way that maximizes sound projection while avoiding any interference with other components and potential direct spray from road spray. A high-value alternative, one that’s really handy when space is absolutely at a premium, is the DENALI SoundBomb Mini Low-Tone Horn. Far more powerful than horns on most powersports vehicles, the SoundBomb Mini sill puts out 113 decibels of attention-getting sound but fits into a space less than 3.5 inches square and 2.5 inches deep. Moreover, the Mini is quite power efficient, meaning that many vehicles can handle the needed 5-amp load without needing an external power relay. And if that’s not the case for your application, a Plug&Play harness is also available. The Soundbomb horn has a hefty 20 Amp draw. It measures about 138 mm wide, 116 mm tall and it’s about 88 mm deep. It also comes with a relay, but as always, we used a pre-made horn relay wiring harness (review). Sound Output The two of us spent quite a bit of time trying to find a good location to mount the Soundbomb horn on the BMW F 800 S. We tried to mount the horn behind the fairing and also in front of the exhaust pipes, on the side of the engine and even towards the rear, but nothing worked.
Twisted Throttle said the horn was designed to be more reliable than the Stebel version, while still providing a loud air horn sound. I have Clearwater Glenda lights (review) on my bike, and with a little wiring, soldering, and Clearwater’s instructions, the Glendas go to maximum power if the horn is hit. A nice feature which is standard on the larger Clearwater lights, but not the Glendas. One main difference is that the compressor on the Soundbomb is attached with a clamp with two bolts. On the Nautilus, the horn or trumpet section appears to be glued to the compressor. Sometimes, though, there’s no enough room under the hood for a one-piece horn, and that’s where the DENALI SoundBomb Split comes into its own. It’s the same basic horn as the SoundBomb Compact only with the 12-volt air compressor and the horn itself separated by a supplied durable hose. This feature allows installers to locate each component where they make the most sense, without compromising performance. Like the SoundBomb one-piece, the SoundBomb Split is available with a plug-and-play wiring harness that includes a water-resistance relay and high-quality wiring with pre-installed connectors.The horn won’t fit behind the exhaust and you don’t want to get these plastic horns near the exhaust anyway (as we learned to our chagrin). The Soundbomb horn used in this review is the single unit version. There’s also a version with a separate compressor canister that can be remotely mounted. But, using the Extech dB meter, we measured 118 dB at three feet for the Soundbomb, a good showing. The first replacement part on any bike I own is the horn. And I always install an air horn. I have owned this Denali horn, installed on an Aprilia 850 V-twin, for about a year now. In fact, we wouldn’t be surprised to learn that the Soundbomb is made by Stebel or by ex-Stebel designers.
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