RDL SAS-HC8 Headphone Amplifier with Source Selection for SourceFlex Distributed Audio SystemThe SAS HC8 Headphone Control Station is a SourceFlex headphone listening station for use with exercise equipment or on a tabletop. Each unit features a source selector with numeric indicator and volume adjustment buttons. Sealed touch controls protect the internal circuitry from debris and moisture. The rugged metal case is both attractive and durable. If headphones are left unplugged from the SAS HC8, the internal processor resets the volume to a