STUDIO 6 88 LCR Cinematic Sound Dual 8" 2-way In-Wall Loudspeaker, 1" (25mm) Compression Driver with High-Definition Imaging (HDI™) waveguide, Dual 8.00" (203mm) Polyplas® woofer, Nominal Impedance 6-Ohm, Sensitivity 96dB,Power Handling 120W RMS (500W Dynamic), Recommended Amplifier Power 50W - 175W, Frequency Response 47Hz - 20kHz, Crossover Frequency 2.5kHz, Grille Dimensions (HxW) 9.9" x 21.5" (251mm x 547mm), Cutout Dimensions (HxW) 8.7" x 20.4" (221mm x 517mm),Mounting Depth 3.74in (95mm)