Fostex PH5 is a headphone amplifier with two inputs and five outputs. It can be used to connect multiple headphones to a single source, or to connect multiple sources to a single headphone. Each output has its own volume knob, so you can control the volume of each headphone independently. The PH5 also has a input selector switch, so you can choose which input source you want to listen to.

Here are some possible use cases for the Fostex PH5:

• In a home studio, you can use the PH5 to connect multiple headphones to your audio interface, so that you and your bandmates can all listen to the same mix.