Upgrade your car’s sound system easily. This adapter lets you connect better speakers, amps, or a DSP to your car’s existing audio system if it uses the MOST 25 bus format.
AUDI
BMW
Land Rover
Mercedes
Porsche
Volvo
The adapter converts the MOST25 Toslink 3.0 to SPDIF output suitable for use with DSP amplifiers or any aftermarket audio device with digital input.

The OPTIMOST25 is a device designed to seamlessly integrate DSP products into vehicles equipped with premium sound systems using the MOST25 data stream communication system. Here’s a detailed breakdown of its features and functionality:
Key Features of OPTIMOST25

MOST25 Data Stream Integration
Lossless and Interference-Free Communication: The device taps into the MOST25 data stream used in premium vehicles to transmit audio signals without loss or interference.
Automatic Music Signal Detection: It automatically identifies and extracts the music signal from the MOST25 data stream.
High-Quality Digital Audio Output.
SPDIF Format: Outputs the audio as a high-quality digital stereo signal in SPDIF format.
Optical Digital Output: Ensures that the signal is transmitted to signal processors and DSP amplifiers without degradation.
Compatibility and Adaptability.
Car Model Adaptation: By setting jumpers, the device can be adapted to different car models.
Volume, Balance, and Tone Control: The original radio controls for volume, balance, and tone remain functional.
Special Features for BMW Vehicles.

Serial Number Handling:

Serial Number Detection and Copying: In vehicles where MOST25 components are protected by a serial number, the function of the OPTIMOST25 detects and copies the serial number from the replaced component.
Automatic MOST Data Bus Registration: The device logs onto the MOST data bus automatically after copying the serial number, ensuring seamless integration.
Usage and Installation
Setting Jumpers: To adapt the OPTIMOST25 to a specific vehicle model, jumpers on the device need to be configured accordingly.
Plug-and-Play: Once installed and configured, the device integrates with the vehicle’s existing sound system without requiring additional adjustments.
Preservation of Original Functionality: The original car radio controls remain functional, providing a familiar user experience while enhancing audio quality.