Las Vegas, NV, January, 2014 – Audiomobile is pleased announced it is now shipping the new “LineDrive” series of active, OEM Interface preamps. This rapidly expanding category allows easy upgrades to factory Navigation and audio systems, without the common problems of ground-loop noise or compromised frequency response, typical of traditional passive, transformer type LOC adaptors. Las Vegas, NV, January, 2014 – Audiomobile is pleased announced it is now shipping the new “LineDrive” series of active, OEM Interface preamps. This rapidly expanding category allows easy upgrades to factory Navigation and audio systems, without the common problems of ground-loop noise or compromised frequency response, typical of traditional passive, transformer type LOC adaptors.