What are the major difference between the HELLA 007424801 and the 007424804?

I think the only difference would be the frequency of the horns. Other than that, I don't know of any other difference. Just my opinion.

Is one horn louder than the other?

You can check out the specifications on www.myhellalights.com and you down load a hella app that has sound from the app store. This has 116 db and the other is 228. This horn sounds like a trumpet and the supertone has a higher pitch.

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HELLA 011225841 Black 12V BX Trumpet Horn Kit (Audi)

HELLA 011225841 Black 12V BX Trumpet Horn Kit (Audi)

Product ID: 33878254

Details

Brand
Hella
Color
Black
Item dimensions L x W x H
4.25 x 4.25 x
Material
Acrylonitrile
Voltage
12 volts

🔊118 dB piercing sound

🔋12V power optimized

⚙️Vehicle-specific M8 bracket

81620CFA

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Description

🚗🔊 Own the road with sound and style that commands respect!

SAFETY MEETS STYLE - Sleek black finish complements your Audi’s aesthetic while boosting your on-road presence and confidence.
PRECISION FIT FOR AUDI - Engineered with a vehicle-specific M8 screw bracket and connector for seamless Audi integration—no guesswork needed.
COMMAND ATTENTION INSTANTLY - Unmatched 118 dB sound cuts through any traffic noise, ensuring you're heard when it matters most.
TRUSTED LEGACY OF EXCELLENCE - Backed by over 100 years of HELLA’s automotive innovation, delivering reliability you can count on.
BUILT TO LAST WITH GERMAN ENGINEERING - Crafted from ABS, alloy steel, and stainless steel for durability that withstands daily urban hustle.

The HELLA 011225841 Black 12V BX Trumpet Horn Kit is a high-performance, vehicle-specific horn designed for Audi models. Delivering a powerful 118 dB sound, it features a precision M8 screw bracket and connector for perfect fitment. Constructed with durable ABS, alloy steel, and stainless steel, this horn combines German engineering excellence with a sleek black design, ensuring both safety and style on the road.

Specifications

ASIN	B00CY9ZYQA
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#14,165 in Automotive ( See Top 100 in Automotive ) #5 in Musical Horns #31 in Air Horns
Brand Name	Hella
Color	Black
Compatible with Vehicle Type	Passenger Car
Customer Reviews	4.5 4.5 out of 5 stars (355)
Fit Type	Vehicle Specific Fit
Global Trade Identification Number	04082300397109
Included Components	Horn
Item Dimensions	4.25 x 4.25 x 3.25 inches
Item Type Name	Horn Kit
Manufacturer	HELLA
Manufacturer Part Number	011225841
Manufacturer Warranty Description	Limited 1 Year
Material Type	Acrylonitrile Butadiene Styrene (ABS), Alloy Steel, Plastic, Stainless Steel
Model Number	011225841
Noise Level	118 db
OEM Equivalent Part Number	4F0951221A, 4L0951223A, 8H0951221, 8H0951223, AUDI
Style Name	Classic
Unit Count	1 Count
Voltage	12 volts

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