JBL Studio 2 6IC Premium In-Ceiling Loudspeaker with 6.5" Woofer Impedance: 8 ohms Recommended Amplifier Power: 80W Frequency Response: 38Hz - 20kHz Loudspeaker Sensitivity: 86dB 2.83V @ 1m Low Frequency Driver Size and Material: 6.5" (165mm) Polypas Woofer High Frequency Driver Size and Material: 1" (25mm) Pivoting CMMD Lite Tweeter High Frequency Control: +/- 3dB Cutout Dimensions: (D) 8" (203mm) Mounting Depth: 4-11/16" (119mm) Compatible Wall Material Thickness: 0.5" - 2.0" (12mm-51mm) Shipping Units of Measure: Each Warranty: 5 Years Pre-Construction Bracket Part Number: PCK6C Back Box Part Number: FBB6C