The Broadcast Devices GPM-300 Series matrix switcher is a basic crosspoint switcher and provides an economical solution to your digital and/or analog audio routing and switching needs.The scalable modular design lets you purchase only what you need with room to expand. DSP architecture provides outstanding flexibility and reliability in a single rack chassis. An example application would be one EAS generator (digital or analog source) connected to the GPM-300 series matrix switcher. The GPM-300 can now switch the single EAS generator source to up to eight studios in your choice of digital/analog audio, or both.The GPM-300 is available in ten I/O configurations. This version, the GPM-300-10, offers 4 in, 4 out analog stereo pairs and 4 in, 4 out composite stereo pairs.