Problem: How do you connect a CD player, a synthesizer and the line output from a bass amp to a tape deck?Solution: Use a simple stereo mixer. The PowerMIX III can accept either mono or stereo signals and mixes them down to stereo or identical L/R mono signals. Additionally, the PowerMIX III provides a headphone output with its own level control.Usage:1. Plug the AC adapter into the 12V DC input on the PowerMIX III and plug the other end into a 120V AC wall socket.2. Plug your stereo signal sources into the separate L/R Inputs on channels 1 to 3. Mono sources can be plugged into the Right Input on any channel. It is not recommended that you connect 2 mono sources to any one channel.