Bosch Super-Tone Horn – Overview & Key Features
The Bosch Super-Tone Horn (also referred to as "Supertone") is a high-performance automotive horn designed for maximum audibility and long-lasting reliability.
Core Features
Powerful Sound Output — Up to ~110 dB
Delivers a loud, attention-grabbing tone capable of cutting through urban noise.
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Forward-Directed, Penetrating Tone
Tuned for long-distance projection with an unobstructed forward sound pattern.
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Durable Build with Weather-Proofing
Encased in rust-resistant materials with a Teflon pressure-compensation filter to guard against water and dust.
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EMC Protection for Electronic Safety
Features electromagnetic compatibility shielding to prevent interference with vehicle systems (like radios or ECUs).
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Compact Disc Design (~10.5 cm diameter)
Slim profile makes it easier to install in tight engine bay spaces; available in both 12 V and 24 V versions.
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Available Variants (From Bosch Brochure)
Voltage Output Frequency Part Number
12 V 300 Hz or 375 Hz 320 223 021 / 022
24 V 300 Hz, 375 Hz, 500 Hz 320 226 007 / 010 / 012
12 V (decorative ring) 500 Hz 320 223 003
Disc horns have Type A/B mounting options, all around 0.9 kg
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Installation Tips & Real-World Insights
Always Install with a Relay
Many users advise wiring the horn via a dedicated relay with fused power directly from the car battery to ensure full voltage and protect factory circuits.
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Much Louder than Stock Horns
Users report the Super-Tone horn to be noticeably louder and richer in tone compared to OEM units:
"It’s definitely louder. The tone is very different though… the super tones sound more like a classic European car horn."
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Summary Table: Why Bosch Super-Tone?
Benefit Description
High Visibility ~110 dB output ensures your presence is heard even in heavy traffic.
Directional Clarity Designed for clear forward sound projection.
Robust & Weatherproof Built to withstand elements with corrosion and impact resistance.
Electronic Safe EMC protection minimizes interference with vehicle electronics.
Compact Form Factor Slim disc shape fits most modern engine compartments; versatile mounting.
