Adapter for original optical amplifier MOST-AMP

If your Mercedes or Porsche has the fiber-optic amplifier sound system such as Harman-Kardon or BOSE, then instead of bypassing the amplifier when you change stereo you can keep it! Buy this fiber-optic decoder box and the replacement head unit will work with your amplifier sound system directly.

This adapter is required in vehicles which have an original Fiber-Optic sound system. This decoder provides high-quality audio and video levels for your in-car entertainment needs. MOST fiber optic interface designed to retain the use of the original fiber optic audio amplifier (Mercedes Audio Gateway or harman/kardon amplifier) in various models to allow the fitting of an SMARTY Trend head unit.

The interface connects at the back of the radio, it takes the phono audio output from the new radio and converts it to a digital signal that works with the original MOST fiber optic amplifier in the car.

To identify if you have an amplified audio system, you can check with the original invoice received when the car was purchased from the factory. Some vehicles will have clear markings on the speaker grills indicating the presence of an upgraded audio system.