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Sonance IS4 Invisible Series In-Wall Speaker The Sonance IS4 Invisible Series speaker sets the benchmark for performance and installation flexibility in invisible speakers. Fully concealed within walls or ceilings, it delivers exceptional sound quality while remaining completely hidden. Key Features Fully concealed installation within walls or ceilings for an invisible finish Speaker surface can be finished with up to 1/8" (3mm) of lightweight flexible materials including finishing compound, paint, venetian plaster, wallpaper, or wood veneer Available in four models to suit any installation or budget Optional enclosure reduces sound transfer to adjacent rooms State-of-the-art planar diaphragm technology for superior sound quality Rigid metal frame and optional enclosure ensure best-in-class performance for fully concealed speakers Specifications Tweeter: 4 sq. in (27 sq. cm) planar diaphragm, driven by a 1" (25mm) voice coil Midrange: 17 sq. in (110 sq. cm) planar diaphragm, driven by a 1" (25mm) voice coil Woofer: 113 sq. in (732 sq. cm) planar diaphragm, driven by a 2" (50mm) voice coil Frequency Response: 40Hz – 20kHz ±3dB Impedance: 8 ohms nominal Power Handling: 100 watts RMS Sensitivity: 90dB (1W/1 meter) Dispersion: 170º hemispherical up to 10kHz Finish: Paper surface ready for up to 1/8" (3mm) flexible material and paint Overload Protection: Three independent self-resetting gel switches (low, mid, and high) Cutout Dimensions Without Enclosure (WxHxD): 16-1/8” x 24-1/8” x 2” (409mm x 613mm x 51mm) Cutout Dimensions With Enclosure (WxHxD): 16-1/8” x 24-1/8” x 3-13/16” (409mm x 613mm x 97mm) Enclosure Dimensions (WxHxD): 14-3/32” x 22-3/32” x 2-1/8” (358mm x 561mm x 54mm) Shipping Weight: 25 lbs (11.25 kg) per pair Operating Temperature: 0° - 125°F (-17.7° - 51.7°C)