WHD WL 6/2-8 SI, 2-Way Wall / Ceiling LS System, Power: 50/70 W, Impedance: 8 Ohms, Frequency response: 100-20,000 Hz (+/- 3dB), Without transformer, Impregnated membrane, Perforated plate (galvanized and varnished), Very flat (85 mm), Includes mounting material, Colour: silver (RAL 9006), Beautiful design,