All four speakers sound great, pulled from functioning whole home audio system. Two of the speakers have one of their mounting pins that snapped, reflected in price, but still functional (and can be replaced).

6-1/2" woofer recommended amplifier power: 5 to 75 watts frequency response 65-20,000 Hz (±3dB) sensitivity 90 dB 6-ohm impedance dimensions: 9-1/4" diameter cutout dimensions: 8-1/16" diameter depth above ceiling: 4-11/16" (assumes 1/2" sheetrock) spring-loaded push terminals (accomodate 12- to 20-gauge speaker wire) rustproof aluminum grilles moisture- and UV-resistant white finish easy-flip tab mounting system