Alpine SPS-57C2

Tweeter Silk Soft-dome Tweeter w/Swivel Capability Woofer Square Voice Coill Wire Power Handling Power Handling Capacity (RMS): 50W Power Handling Capacity (Peak): 250W General Mounting Depth (mm): 63. 5mm Mounting Diameter (mm): 183mm x 126mm Peak Power Rating: 200W RMS Power Rating: 40W Weight (One Speaker): 2. 64kg Frequency Response: 35Hz - 30kHz Impedance (Nominal): 4 Ohm Sensitivity: 92 dB/W/m Dimensions Woofer Depth (mm): 63. 5mm Woofer Depth (in): 2. 5¨; Woofer Diameter (mm): 127mm x 177. 8mm Woofer Diameter (in): 5¨; x 7¨; Woofer Mounting Diameter (mm): 185. 42mm x 127mm Woofer Mounting Diameter (in): 7. 3¨; x 5¨;