A splitter allows a single peripheral to output to multiple displays.

Audacity is a popular free and open source audio editor for Windows and operating systems. It provides a variety of audio editing tools that also include the capability to split audio into multiple ...

I'd get rid of the old amps entirely and put a constant-voltage (70V, etc) commercial system in its place. It'll save you a ton of space (a single amp with output transformer can feed dozens of ...