But this is only halfway to a karaoke machine. To finish the build, [Paulo] created an amplifier (with a fabulous Manhattan-style PCB) for an iPhone’s audio output.

A screen to display lyrics will also be needed. Among the necessary equipment is a microphone, mixer, speaker, and amplifier. You can sometimes get all-in-one karaoke mixers, speakers, and amplifiers ...

Purchase a digital karaoke system, high-quality speakers, CD Gs (music), transportation equipment, wireless microphones, mixer, amplifiers, and a television monitor.