This is the Visaton Full Range Speaker 16cm 40w 8 Ohm [VS-MSFR6.5] 16cm (6.5'') full range driver with tweeter cone. Due to the good highs very suitable for sound reinforcement systems. Water resist cone due to impregnation. Removable decoration ring. Typical applications: Ceiling-mounted speakers Public address applications Electronic musical instruments Features: Rated power: 40W Maximum power: 60W Nominal impedance Z: 8 Ohm Frequency response: 70-20000 Hz Mean sound pressure level: 87 dB (1 W/1 m) Opening angle (-6 dB): 41°,/4000 Hz Excursion limit: /?3mm Resonance frequency fs: 75 Hz Magnetic induction: 0.