STUDIO 665C Dual 5.25", 2-way Compression Driver Center Loudspeaker,Dual 5.25" (133mm) PolyPlas Low-Frequency Woofer, High Definition Imaging (HDI) Waveguide with 1” (25mm) High Frequency Compression Driver, Recommended Amplifier Power: Max 150W, Frequency Response: 64 Hz - 40 kHz, Sensitivity: 85 dB, Nominal Impedance: 6 Ohms, Enclosure Type: Sealed Enclosure, Dimensions (W x D x H): 440 x 190 x 190 mm, Weight: 8.62 kg