- Loudspeaker Type: Coaxial Full Range Bass Reflex System - Frequency pesponse: 55Hz-20KHz - Power Handling: 150W RMS/ 360W program - Recommended Amp: 150W to 360W @ 4 Ohms - Sensitivity at 1W/1M: 91 dB - Woofer: 8"+3" High Efficiency Woofer - 1" Aluminum