Cadence Acoustics XS452 4-Inch 100 Watt Peak 2-Way Speaker System Mounting Depth: 1.70-inch Sensitivity: 88dB @ 1w/1m Frequency Response: 85Hz  20 kHz Power Handling: 30W RMS/100W Peak/200W Xenith Power Cadence XS452 4-inch 4 ohm 2-Way Speaker System Cadence XS452 4-inch 4 ohm 2-Way Speaker System Power Handling: 30W RMS/100W Peak/200W Xenith Power Frequency Response: 85Hz  20 kHz Sensitivity: 88dB @ 1w/1m Mounting Depth: 1.70-inch