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Fitment Note: Add our BMW wiring adapter DNL.WHS.10100 below for a plug & play installation to BMW motorcycles. If they did, we guarantee that just about every owner would go for the option, adding to manufacturers’ and retailers’ profits. Currently, the manufacturers are leaving money on the table.
The mounting problem is even more complicated because there’s just a single bolt location on the horn body that can be used for mounting. This is a cast metal cutout that fits the 8 mm hex head bolt that comes with the kit. The clamp is said to be more resistant to vibrations, which helps to improve overall reliability of the horn. But, using the Extech dB meter, we measured 118 dB at three feet for the Soundbomb, a good showing.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. A motorcycle horn is not just a federally mandated accessory or a nice-to-have. And a horn loud enough to get the attention of errant and careless drivers is not just a luxury. For daily riders, touring fans, and city commuters, an attention-getting horn is much, much more—it’s a necessity.
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. 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. There’s nothing like going through all the trouble of mounting a big Nautilus — no easy task — and having it fail before you get the bike out of the garage. Oh well… For best results, the Denali horn should really be mounted so that the dual trumpets point forward, not to the side. This complicates the process of finding a suitable mounting position, because it means the widest part of the horn must face forward.Producing a massive 113 decibels of sound, the SoundBomb can be over twice as loud as a standard motorcycle horn! The hardest part of dealing with the Nautilus or Soundbomb is mounting it on the motorcycle. These are big horns and most motorcycles have very limited spaces underneath the fairing or around the engine for mounting such a monster. Designed to be a direct Plug & Play upgrade from your factory horn, requiring no additional relay or wiring harness *. 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. Some motorcycle owners have opted for the huge Stebel Nautilus Max (review) or more likely, the Stebel Nautilus Compact (review) as their replacement horn choice.
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.
Accessories
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). Designed to be a direct Plug & Play upgrade from your factory horn, requiring no additional relay or wiring harness. The Denali Soundbomb horn was made for Twisted Throttle as a replacement for the Stebel Nautilus Compact. Without getting into too much detail, we were told that TT needed to find a replacement for the Nautilus, for several reasons. 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 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.
However, Twisted Throttle (the Soundbomb distributor/retailer) sells accessory mounting kits for some motorcycles. We wanted to locate the horn far enough away from the exhaust but as close as possible to the engine. This wouldn’t work on the right side of the F 800 S, due to the exhaust location. 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 OutputIn fact, we wouldn’t be surprised to learn that the Soundbomb is made by Stebel or by ex-Stebel designers. Producing amassive 113 decibels of sound, the SoundBomb is over twice as loud as your standard motorcycle horn! Original equipment motorcycle horns are notoriously awful, with a wimpy “meeep-meeep” type being way too common. 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. Fitment Note: Add our BMW wiring adapter ( DNL.WHS.10100) for plug & play installation to BMW motorcycles.
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