Q: If the OEM amplifier uses data line communication, then OEM amplifier bypass is needed. What does this mean exactly, and why? 

A:   Because our machine retains the original car system, if the original car amplifier is the kind of data cable that needs to be transferred as if the amplifier is installed. But the original car like the Mustang is directly retained. Generally speaking, it is to install an amplifier to transfer the original car host, not from our machine.