2x4 TOSlink Optical Audio Splitter Distribution Amplifier Amp Distributor Multiplier Select between 2 optical audio input signals and distribute to 4 identical optical audio outputs. Built-in audio amplifier ensures loss-less signal integrity. Cables connected to both ends of the unit can run up to 50ft. Suitable for home or professional audio distribution. Supports PCM as well as 5.1,7.1 surround formats with up to 96KHz sampling.