JL Audio C1-650x

C1-650x:
Continuous Power Handling: 50 Watts
Recommended Amp Power: 10-75 Watts per channel (RMS) 
Efficiency: 90.5 dB @ 1W/1m | 96.5 dB @ 1W/0.5m
Sensitivity: 93.0 dB @ 2.83V/1m
Nominal Impedance: 4 ohm
Frequency Response: 48 Hz - 24 kHz ± 3 dB