The OMNITRONIC PA 6-zone mono volume controller is an analog 100 V line device for independently controlling six mono audio zones. It provides six audio transformers, 10-step attenuation, and six built-in 24 V emergency-priority relays. The unit is rated at 6 × 10 W RMS, supports a 50–18,000 Hz frequency range, and uses screw plug connections. Its aluminum front panel supports 19-inch rack installation and occupies 2 U.