OMNITRONIC CSR-6B is a passive 100 V flush-mount ceiling speaker for speech and background music in indoor public address systems. It features a 6-inch full-range loudspeaker, 6 W RMS rated power, switchable 3 W or 6 W power tapping via screw terminal, a 75–20,000 Hz frequency range, 93 dB sensitivity, and 104 dB maximum SPL. The speaker has a black HIPS plastic enclosure and grille, a 19.3 cm diameter, 7.8 cm depth, and weighs 0.76 kg.