Create a built-in sound system with these passive speakers, and enjoy clear sound and comfortable listening from anywhere in the room. Power with Amp for the unmatched Sonos experience, including custom Trueplay™ tuning and endless possibilities for multiroom listening. Designed to disappear The precisely engineered grilles can be painted to match your ceiling for a virtually invisible sound system. FEATURES One high-excursion polypropylene woofer produces rich mid and low ranges. One-inch tweeter produces crisp high frequencies. Trueplay: This software measures the acoustics of the room then fine-tunes the speaker. Sonos Amp and supported iOS device required. TECHNICAL SPECS Frequency Response: 44Hz - 20KHZ (±3dB) Rated Impedance: 8 Ohms nominal Sensitivity: 89dB SPL (2.83V/1m) Dimensions: Diameter: 9.27 in (235 mm), Cutout diameter: 8.25 in (210 mm), Depth: 4.73 in (120 mm) Weight: 5.01 lb (2.28 kg) each Power Handling: 5 watts minimum,130 watts maximum