Speaker with Backbox, In-Wall, Overall Height (In.) 12 in, Overall Width (In.) 8 5/8 in, Overall Length (In.) 4 1/4 in, Enclosure Color White, Enclosure Material ABS Plastic, Tweeter Dia. (In.) 1 in, Tweeter Composition Titanium, Woofer Dia. (In.) 6 1/2 in, Woofer Composition Fiberglass with Rubber Surround, 40 W Watt (RMS), Max. Wattage 80 W, Sensitivity (dB) 89 +/-3, Impedance (Ohms) 8 ohm, Transformer Settings 70/25V (40 W, 30 W, 15 W, 7.5 W, 5 W, 2.5 W, 1 W, 0.5 W, and 8 Ohms)