Pre-AMP interface box for Mercedes-Benz Fiber optic

Coaxial transmission lossless new upgradecation is required
Discover the power of digital pre-amplifier fiber optic Interface box

Non-destructive upgrade easy to operate

OABR the input
Original car interface control
Preserve all media tones
Car grade material
Audio decoding
Front and rear audio output


An effortless choice for upgrading Mercedes-Benz audio quality, compatible with all top brands of DSP amplifiers

Experience the Upgrade with Premium Mercedes-Benz Audio Services.
Installation of a Pre-amplifier Interface Box Enhances the Driving Experience.
Superior Audio Quality Ensured with Top-Notch Mercedes-Benz Amplifier. Advanced DSP Amplifiers in the Mercedes-Benz Sound Upgrade Take In-Car Audio to New Dimensions.


Mercedes-Benz A (2013 – 2019)
Mercedes-Benz B (2013 – 2019)
Mercedes-Benz C (2013 – 2019)
Mercedes-Benz E (2013 – 2019)
Mercedes-Benz GLC (2013 – 2019)
Mercedes-Benz GLE (2013 – 2019)
Mercedes-Benz GLS (2013 – 2019)
Mercedes-Benz GLA (2013 – 2019)
Mercedes-Benz G (2013 – 2019)
Mercedes-Benz S (2013 – 2023)
Mercedes-Benz M (2013 – 2019)
Mercedes-Benz GL (2013 – 2019)
Mercedes-Benz CLA (2013 – 2019)
Mercedes-Benz CLS (2013 – 2019)
Mercedes-Benz SLC (2013 – 2019)
Mercedes-Benz SLK (2013 – 2019)
Mercedes-Benz SL (2013 – 2019)

High-Quality HIFI sound enhancer

Improve audio source quality

Installation and debugging

     In car audio retrofit, the quality of the sound source is the most important factor. Due to the different high/medium/low configurations of luxury cars, the power amplifier of the head unit on some low and medium configuration cars can’t meet the requirements of audiophiles. The sound source part has been processed by default tuning and power amplification during output, and the output is a high-level sound signal.

 The function of the audio box is to separate the processing commands of the host for audio data, such as volume,

 sound effects, etc., and discard the original car power amplifier. It outputs general-purpose optical fiber/coaxial sound signals in the format required by professional audio equipment, thereby completing the conversion of car-specific network data to professional audio data. In this way, the unprocessed original sound source can be obtained, and at the same time, an external high-quality sound source can be added to match with the retrofit aftermarket power amplifier (with digital DSP function, supporting common optical fiber/coaxial signals), thereby bringing a perfect sound modification effect.

Lossless upgrade better quality

Keep all the functions of the original car: Bluetooth, WIFI, USB, DVD/CD, radio, reversing radar, navigation, favorites, parking reminder and other sounds and functions.

Elevate the Mercedes-Benz audio system effortlessly with ‘Pre-amplifier Interface Box for Mercedes-Benz’. This innovative interface box serves as the key to enhanced in-car audio experience. Paired with our premium Mercedes-Benz AMPLIFIER, it provides a immersive audio upgrade.

Optical fiber decoding non-traditional high-to-low conversion

OST optical fiber interface, complete digital transmission; original car control interface; car regulations,audiophile grade materials; non-destructive upgrade, no trace of restoration; standard SPDIF fiber coaxial output.

In premium vehicles, the ‘Pre-amplifier Interface Box’ detects the audio signal within the MOST25 data stream. This lossless and interference-free communication allows music to be output in the highest quality digital stereo signal. Thanks to an optical digital output, signal processors and DSP amplifiers with a digital SPDIF input can be fed with a perfect audio signal.

Play with sound System Modification to unlock more possibilities

All-aluminum casting body Efficient heat dissipation design

CNC (numerical control machine tool) cutting, shell coating hardening treatment, reducing body size, increasing air contact area, can dissipate the heat generated by electronic components in time. Make the decoder maintain a constant temperature inside under each power.

Linear power supply

Immerse yourself in a world of superior sound quality with our Mercedes-Benz audio upgrade solutions featuring Mercedes-Benz fiber optic boxes. Take your Mercedes-Benz audio system to new heights with the synergy of the Mercedes-Benz fiber optic box and Mercedes-Benz amplifier to create an unparalleled listening experience.