Train manufacturers and operators are always struggling with limited space in the driver's cab, as the same audio equipment is often installed for different systems, such as train radio and passenger information. Furthermore, the multiple microphones are not very user-friendly for the train driver to be able to manage the different operations of the subsystems. For this reason, ErvoCom is launching the railway audio splitter ASP23 which is an active microphone amplifier that splits the audio signal between two different subsystems on the train. This leads to a halving of the number of microphones required. In contrast to passive splitters, the audio signal is actively amplified and galvanically isolated.