STUDIO 610 5.25", 2-way Compression Driver wall mountable Surround Loudspeaker,5.25" (133mm) PolyPlas Low-Frequency Woofer, High Definition Imaging (HDI) Waveguide with 1” (25mm) High Frequency Compression Driver, Recommended Amplifier Power: Max 100W, Frequency Response: 65 Hz - 40 kHz, Sensitivity: 84 dB, Nominal Impedance: 6 Ohms, Enclosure Type: Sealed Enclosure, Dimensions (W x D x H): 285 x 150 x 300 mm, Weight: 5.86 kg