The PSB CS series of speakers is designed with the goal of providing maximum enjoyment of listening to music outdoors and as such, the CS500 model offers an exceptional price/quality ratio. Waterproof, UV resistant material, rubber covers for audio terminals, horizontal or vertical placement with rotating PSB logo. Sensitivity 87dB, nominal impedance 8 Ohms, frequency range 65-23,000Hz, recommended amplifier power from 20-120W, dimensions W.192mm x H.266mm x D.203mm, weight 2.59kg. Available in black and white.