The OMNITRONIC CSH-4 is a passive, 2-way flush-mount coaxial ceiling speaker for fixed installation in restaurants, bars, hotels, sports centres and similar venues. It features a 4-inch woofer, 0.75-inch tweeter with PTC protection, a crossover, a durable plastic cabinet and a metal grille. The speaker supports 8-ohm and 100 V PA operation, with selectable 2.5 W, 5 W, 10 W and 20 W RMS power tapping. Its frequency range is 90–20,000 Hz and sensitivity is 87 dB.