The OMNITRONIC CSUB-8 is a passive flush-mount ceiling subwoofer designed to provide bass support for PA systems in permanent installations. It uses one 8-inch woofer with a dual voice coil rated at 2 x 8 ohms and provides 60 W RMS power handling. The speaker has a 40–5000 Hz frequency range, an 80 dB sensitivity rating, a plastic cabinet, and a metal grille. Screw clips enable installation in ceilings up to 15 mm thick.