A Whirlwind PB12 is a passive press box designed to distribute a single line‑level audio feed to up to twelve microphone‑level outputs. Commonly used at press conferences, media events, government briefings, and corporate presentations, it allows multiple broadcasters, recording devices, and media outlets to receive the same clean audio signal without requiring separate feeds from the audio system. Each output is transformer isolated to help prevent noise, ground loop issues, and interference between connected devices, ensuring reliable signal distribution even in demanding environments. Housed in a rugged steel enclosure, the PB12 provides a simple and dependable solution when multiple audio outlets need access to a single program source.