{"product_id":"hella-marine-supertone-twin-horn-kit-118-db-12v","title":"Hella Marine Supertone Twin Horn Kit 118 dB 12V","description":"\u003cp class=\"nvn-hero\"\u003eThe Hella Marine Supertone horn kit pairs a 500 Hz high-tone and a 300 Hz low-tone horn for a full, 118 decibel blast that cuts through wind and engine noise. Steel-bodied, 12 volt, and 4.7 inches round, it's a simple, loud sound signal for just about any boat.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Hella Marine Supertone horn kit gives you two horns that work as a team. One puts out a 500 Hz high tone, the other a 300 Hz low tone, and when they sound together you get a full, layered blast that reads as 118 decibels. That's the kind of signal that actually cuts through wind, engine noise, and a busy channel, which is exactly what you want when you're closing on another boat and need to be heard right now.\u003c\/p\u003e\n\u003cp\u003eEach horn measures 4.7 inches round and runs on a standard 12 volt system, pulling about 5.5 amps (roughly 72 watts) when both are sounding. The housing is steel with a black finish and a red protective grille over the diaphragm. It's a simple, honest piece of gear. No app, no fuss. You press the button, it's loud.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Center consoles, walkarounds, sailboats, pontoons, small cruisers, really any 12 volt boat that needs a proper sound signal. The U.S. Coast Guard requires vessels under 20 meters to carry an efficient sound-producing device, and at 118 dB this kit clears that bar with room to spare. It's also a common upgrade on boats where the original single horn has gone quiet or tinny with age.\u003c\/p\u003e\n\u003cp\u003eWhy two tones instead of one? A single-frequency horn can get lost against wind and water noise, especially at a distance. Stacking a 300 Hz low tone under a 500 Hz high tone gives the sound more body and makes it carry farther across open water. It's the same idea behind the classic dual-trumpet sound, and it's why boaters keep coming back to the Supertone setup year after year.\u003c\/p\u003e\n\u003cp\u003eA word on wiring, because it matters here. At 5.5 amps, you don't want to run this straight off a dash button. Wire it through a relay and let the horn button trigger the relay coil. That keeps the heavy current off your switch and stops the button from overheating over time. Protect the circuit with a 10 amp fuse and run 14 AWG wire. On longer runs past about 15 feet, step up the wire gauge to keep voltage drop from robbing you of volume.\u003c\/p\u003e\n\u003cp\u003eMounting is straightforward, but two things are worth knowing. First, mount the two horns a bit apart, somewhere in the 12 to 18 inch range, so the two tones don't fight each other and cancel out. Second, angle each horn 10 to 15 degrees downward, or add a small drain hole, so rainwater and spray drain out instead of pooling on the diaphragm. Do that and you'll get a lot more life out of them.\u003c\/p\u003e\n\u003cp\u003eBe honest with yourself about the environment. This is a steel-bodied horn with a plastic grille. In hard salt-air service it wants a little care. Rinse it with fresh water when you rinse the rest of the boat, keep the terminals coated with dielectric grease, and mount it somewhere with at least some shelter from constant spray if you can. Treated well, it's a reliable, great-sounding horn. Left to soak in salt and neglected, any steel horn will complain eventually.\u003c\/p\u003e\n\u003cp\u003eInstallation is usually well under an hour if you already have a switch and a spot picked out. Most owners run a fused hot from the battery to the relay, tie the horn button to the relay trigger, and ground both horns to a clean, paint-free point on the hull or a bonded ground bus. Give the connections a good crimp, add heat shrink over the terminals, and you've got a setup that'll answer every single time you hit the button. The kit includes both the high-tone and low-tone horns. A relay isn't part of this particular kit, so if you don't already have one in your horn circuit, grab one along with the fuse and wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eDual-tone design pairs a 500 Hz high-tone and a 300 Hz low-tone horn for a full, layered sound that carries across open water\u003c\/li\u003e\n  \u003cli\u003e118 decibel output clears the U.S. Coast Guard sound-signal requirement for boats under 20 meters\u003c\/li\u003e\n  \u003cli\u003e12 volt operation at about 5.5 amps (roughly 72 watts) works on virtually any boat's DC system\u003c\/li\u003e\n  \u003cli\u003e4.7 inch round footprint fits tight console, transom, and rail mounting spots\u003c\/li\u003e\n  \u003cli\u003eSteel housing with a red protective grille shields the diaphragm from debris\u003c\/li\u003e\n  \u003cli\u003eBlack finish keeps a clean, low-profile look at the helm or under the gunwale\u003c\/li\u003e\n  \u003cli\u003eTwo separate horns let you space the tones apart for the best sound and the easiest mounting\u003c\/li\u003e\n  \u003cli\u003eSimple wired operation with no electronics to fail, just power it and press the button\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Hella Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow loud is the Hella Marine Supertone horn kit?\u003c\/summary\u003e\n    \u003cp\u003eIt puts out 118 decibels when both horns sound together. That's plenty to cut through wind, engine noise, and a busy channel.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this kit include a relay?\u003c\/summary\u003e\n    \u003cp\u003eNo. The kit includes the two horns, the 500 Hz high-tone and the 300 Hz low-tone. You'll want to add a relay, a 10 amp fuse, and wire if your horn circuit doesn't already have them.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it meet Coast Guard requirements?\u003c\/summary\u003e\n    \u003cp\u003eThe U.S. Coast Guard requires boats under 20 meters to carry an efficient sound-producing device. At 118 dB, this kit meets that requirement with room to spare.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat wire and fuse should I use?\u003c\/summary\u003e\n    \u003cp\u003eFor typical runs, 14 AWG wire and a 10 amp fuse. On runs past about 15 feet, step up the wire gauge to keep voltage drop from cutting into your volume.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow far apart should I mount the two horns?\u003c\/summary\u003e\n    \u003cp\u003eSpace them roughly 12 to 18 inches apart. Mounting them too close lets the two tones interfere and cancel, which thins out the sound.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I wire it straight to the horn button?\u003c\/summary\u003e\n    \u003cp\u003eUse a relay instead. At 5.5 amps, wiring directly to a dash button can overheat the switch over time. Let the button trigger the relay coil and keep the heavy current off the switch.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it hold up in salt water?\u003c\/summary\u003e\n    \u003cp\u003eIt's a steel-bodied horn, so it wants a little care in salt air. Rinse it with fresh water, keep the terminals coated with dielectric grease, and angle it downward so water drains off the diaphragm.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat voltage and current does it need?\u003c\/summary\u003e\n    \u003cp\u003eIt runs on 12 volts DC and draws about 5.5 amps for the pair, roughly 72 watts when both horns are sounding.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I mount it somewhere exposed to spray?\u003c\/summary\u003e\n    \u003cp\u003eYes, but tilt each horn 10 to 15 degrees downward or add a small drain hole so rainwater and spray drain out instead of pooling inside.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eHella Marine Supertone Twin Horn Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHella Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e003399801\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e4082300002355\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eSupertone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHorn Configuration\u003c\/th\u003e\n\u003ctd\u003eTwin-tone kit (high-tone and low-tone)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSound Output\u003c\/th\u003e\n\u003ctd\u003e118 Decibels\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHigh-Tone Frequency\u003c\/th\u003e\n\u003ctd\u003e500 Hertz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLow-Tone Frequency\u003c\/th\u003e\n\u003ctd\u003e300 Hertz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Voltage\u003c\/th\u003e\n\u003ctd\u003e12 Volt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCurrent Draw\u003c\/th\u003e\n\u003ctd\u003e5.5 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003e72 Watt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003ctd\u003e4.7 Inch Round\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlack with Red Grille\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHousing Material\u003c\/th\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How loud is the Hella Marine Supertone horn kit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It puts out 118 decibels when both horns sound together. That's plenty to cut through wind, engine noise, and a busy channel.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does this kit include a relay?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. The kit includes the two horns, the 500 Hz high-tone and the 300 Hz low-tone. You'll want to add a relay, a 10 amp fuse, and wire if your horn circuit doesn't already have them.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it meet Coast Guard requirements?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The U.S. Coast Guard requires boats under 20 meters to carry an efficient sound-producing device. At 118 dB, this kit meets that requirement with room to spare.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What wire and fuse should I use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"For typical runs, 14 AWG wire and a 10 amp fuse. On runs past about 15 feet, step up the wire gauge to keep voltage drop from cutting into your volume.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How far apart should I mount the two horns?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Space them roughly 12 to 18 inches apart. Mounting them too close lets the two tones interfere and cancel, which thins out the sound.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I wire it straight to the horn button?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Use a relay instead. At 5.5 amps, wiring directly to a dash button can overheat the switch over time. Let the button trigger the relay coil and keep the heavy current off the switch.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it hold up in salt water?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a steel-bodied horn, so it wants a little care in salt air. Rinse it with fresh water, keep the terminals coated with dielectric grease, and angle it downward so water drains off the diaphragm.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What voltage and current does it need?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It runs on 12 volts DC and draws about 5.5 amps for the pair, roughly 72 watts when both horns are sounding.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I mount it somewhere exposed to spray?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, but tilt each horn 10 to 15 degrees downward or add a small drain hole so rainwater and spray drain out instead of pooling inside.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Hella Marine","offers":[{"title":"Default Title","offer_id":45074107269213,"sku":"2009214","price":49.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_20fd5c7c-762d-4c6c-b11f-bd2665fd4810.jpg?v=1789791711","url":"https:\/\/nvnmarine.com\/products\/hella-marine-supertone-twin-horn-kit-118-db-12v","provider":"NVN Marine","version":"1.0","type":"link"}