No sound after connecting your new radio? Here's why – and here's how to fix it
, 2 min reading time
Have you installed a new car radio in your Mercedes, BMW, Audi, or Porsche, but you don't hear any sound? Then there's a good chance your car has a factory-installed premium sound system, such as Harman Kardon, Bose, or Bang & Olufsen. & Olufsen. These systems often use a fiber optic connection instead of standard speaker cables. This means the sound doesn't simply pass through without a special solution.
Why does the sound not work anymore?
Cars with advanced sound systems send the audio signal via optical (fiber optic) cables to an amplifier. If you install a new radio without activating this connection, the sound will remain muted, even if the radio itself is working fine.
Without the right decoder, the amplifier won't recognize the audio signal. This means your speakers will remain silent. Fortunately, you don't have to go back to the original radio or resort to complicated conversions. There's a simple solution: a fiber optic decoder.
What does a fiber optic decoder do?
A fiber optic decoder translates the signal from your new radio into the correct format that the original amplifier understands. This way, both your speakers and the amplifier continue to work without any loss of quality.
✅ Restores sound in cars with optical amplifier
✅ Works with brands like Harman Kardon, Bose and Bang & Olufsen & Olufsen
✅ Plug & Play connection – no intervention required
✅ Suitable for Mercedes, BMW, Audi, Porsche and more
The decoder ensures that you can enjoy your new radio without losing the original sound system.
Which cars require this?
We supply fiber optic decoders for various brands and models. This is especially common in the more luxurious models. Consider:
- Mercedes-Benz with Harman Kardon
- BMW with Logic 7 or Harman Kardon
- Audi with Bose or Bang & Olufsen
- Porsche with Bose
- And other models with MOST or fiber optic systems
Not sure if your car needs this? Send us a message with the make, model, year, and type of sound system. We'll look into it for you.
View our fiber optic decoders
We have several types of fiber optic decoders in stock, tailored to your car and your new radio.
No sound? We'll make your speakers sound like never before.
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