GRADIENT HELSINKI 1.5Gradient Helsinki is tailored to produce the most beautiful sound in all environments from home to lounge bars and hotel lobbies. These loudspeakers are easy to position and they deliver very open and wide sound stage everywhere to the room. CONTROLLED DIRECTIVITYGradient Helsinki utilizes Controlled Directivity, the very essence of unique Gradient loudspeaker design philosophy. By directing more of the speakers high frequencies and middle frequencies to the listener and less to the reflecting surfaces the listener hears more of the original recording and less of the room.GRADIENT HELSINKI 1.5Radiation Patterns Bass: dipole Midrange & treble: cardioidFrequency Response 60-20000Hz +/-2dB, 35Hz -6dBImpedance 6 Ohms, minimum 4 OhmsSensitivity 85dB/2.83V/1mRecommended Amp power 50-250WDrivers 1x300mm long throw woofer, 150mm pulp cone midrange, 19mm aluminum dome tweeterCrossover frequencies 200Hz and 2200HzConnections Professional Speakon connector or pair of binding postsFeatures Bi-wiring, bi-amping ready (Applicable when Speakon chosen)Finish Oak, White oak, Black oak, Walnut. White, Gray or Black modules.Height 92cmWeight 23kg