Hella Marine 007728883 Dual Trumpet Horn Kit 12V
Hella Marine 007728883 Dual Trumpet Horn Kit 12V — Product description
The Hella Marine 007728883 is a dual trumpet horn kit that actually gets heard. Two chrome trumpets, one high tone and one low tone, blend into a 112 dB blast at 12 volts. It ships with mounting brackets and instructions, so you can rig it up on almost any powerboat or sailboat helm in an afternoon.
The Hella Marine 007728883 is a dual trumpet horn kit built to be heard over engine noise, wind, and a busy harbor. You get two chrome trumpets, one tuned to a 510 Hz high tone and one to a 410 Hz low tone. Run them together and they blend into a full 112 dB(A) note measured at 2 meters. That's a sound that says you're there without you having to lean on the button.
We like this kit because it does one job and does it cleanly. It runs off a standard 12 volt marine system and pulls about 5 amps total across both horns, which works out to a 60 watt draw. That's an easy load for almost any boat's DC panel. Wiring is straightforward, but do it right. On any run longer than a few feet we'd pull 10 to 12 AWG wire and switch the horns through a relay rather than straight through a dash button. That keeps voltage drop from softening the tone, and it keeps the current off your switch contacts. Run the horn circuit on its own fuse. Don't share it with your nav lights. The kit itself is just the two horns and the brackets, so plan on supplying your own relay, inline fuse, and wire for a clean install.
Mounting is where a horn kit lives or dies. The brackets in the box fit most radar arches, hardtops, and rail sections. If you're mounting to a cored deck or a thin fiberglass panel, add a backing plate. Horns vibrate, and vibration is what cracks gelcoat around an under-sized fastener over a season or two. One more tip the instructions skip. Angle the trumpets slightly downward so water sheds out of the mouth. Mount them dead level or facing up and they'll eventually pool water and start to warble.
Sound-wise, this pair is right at home on a 25 to 40 foot powerboat or a mid-size sailboat. It's plenty loud for signaling in a fairway, backing out of a slip, or getting the attention of a boat that hasn't seen you. In tight marinas the low tone is what carries around corners and off pilings, and the high tone cuts through wind, so having both is genuinely useful and not just louder for the sake of it. On a big trawler with a tall house and a lot of wind noise, a single trumpet pair can feel marginal, so size up or add a second set if you run a larger boat. Worth saying too, a good horn isn't just a nicety. On a busy weekend a clear, loud signal is a real safety tool when a jet ski or a distracted center console is closing on your bow, and this pair gives you the volume to be noticed the first time instead of the third.
Now the honest part. The housing is chromed ABS, and chrome on the water is chrome on the water. In saltwater it can start to pit or haze after a season or two, especially if the boat lives on a mooring. A quick fresh-water rinse after salty days goes a long way. A lot of owners hit the new horns with a coat of clear before install and swap the exposed hardware for stainless. The low-tone trumpet is usually the first to give trouble, and it's almost always water sitting inside the mouth. The downward-angle trick and a simple cover when the boat's parked will get you years out of this set.
Bottom line, the Hella 007728883 is a proper, loud, good-looking dual horn for a fair price. Rig it with decent wire, a relay, and a little thought about drainage, and it'll signal clean for a long time.
Key Features
- Dual trumpet design pairs a 510 Hz high tone with a 410 Hz low tone, blended for a full 112 dB(A) note that carries across open water
- 112 decibel output measured at 2 meters, loud enough to signal intent from a 25 to 40 foot boat
- 12 volt operation with about a 5 amp total draw, an easy match for any standard marine DC system
- 60 watt power rating delivered through a simple two-horn circuit
- Chrome housing over the trumpets for a bright, finished look at the bow, arch, or hardtop
- Galvanized metal mounting brackets paired with the chromed trumpets, built for exterior mounting
- Compact 3.8 inch trumpet diameter that tucks under a hardtop or onto a radar arch
- Mounting brackets and instructions included so you have what you need to hang both horns
Why Buy from NVN Marine
- Authorized Hella Marine reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Hella Marine 007728883 Dual Trumpet Horn Kit |
|---|---|
| Brand | Hella Marine |
| Manufacturer Part Number | 007728883 |
| UPC | 760687163961 |
| Horn Type | Dual Trumpet (High-Tone + Low-Tone) |
| Sound Level | 112 dB(A) at 2 m |
| High-Tone Frequency | 510 Hz |
| Low-Tone Frequency | 410 Hz |
| Frequency Range | 410 to 510 Hz |
| Voltage | 12 Volt |
| Power Consumption | 60 Watt |
| Current Draw | 5 Amp |
| Trumpet Diameter | 3.8 in |
| Housing | Chrome (chromed ABS) |
| Bracket Material | Galvanized metal |
| Included | Two horns, mounting brackets, and instructions |
Frequently asked questions
How loud is the Hella 007728883 horn?
It puts out 112 dB(A) measured at 2 meters with both trumpets sounding together. That's plenty loud for signaling on a 25 to 40 foot powerboat or a mid-size sailboat.
What's the difference between the two horns?
One trumpet is a 510 Hz high tone and the other is a 410 Hz low tone. Sounded together they blend into a richer, more attention-grabbing note than a single horn. The low tone carries around corners and the high tone cuts through wind.
What size wire and fuse should I use?
The pair pulls about 5 amps total at 12 volts. For any run longer than a few feet, use 10 to 12 AWG wire and give the horn circuit its own fuse. Don't share a fuse with your nav lights.
Does it need a relay?
We recommend one. If you switch the horns straight through a dash button on a longer run you can get voltage drop that softens the tone. A relay lets you run a short, heavy feed from the battery and keeps the high current off your switch contacts.
Where should I mount the horns?
The included brackets fit most radar arches, hardtops, and rail sections. On a cored deck or thin fiberglass panel, add a backing plate so vibration doesn't crack the gelcoat. Angle the trumpets slightly downward so water sheds out of the mouth.
Will the chrome hold up in saltwater?
The housing is chromed ABS. In saltwater it can pit or haze after a season or two, especially on a moored boat. A fresh-water rinse after salty days helps a lot, and many owners add a coat of clear and swap exposed hardware for stainless.
What comes in the kit?
You get the two trumpet horns, one high tone and one low tone, plus mounting brackets and instructions. Plan on supplying your own relay, inline fuse, and wire for a clean install.
What boats is this horn best for?
It's right at home on a 25 to 40 foot powerboat or a mid-size sailboat. On a large trawler with a tall house and a lot of wind noise a single pair can feel marginal, so consider a second set on a bigger boat.
Is this a 12 volt or 24 volt horn?
It's a 12 volt horn. Don't wire it directly to a 24 volt system without a proper converter or you'll damage the horns.
