Cadence Acoustics ZRS55 5.25 Inches 180 Watt Peak 2-Way Speaker System Cadence ZRS55 5.25 Inches 4 ohm 2-Way Speaker System Power Handling: 60W RMS/180W Peak Frequency Response: 90Hz  22 kHz Sensitivity: 92dB @ 1w/1m Mounting Depth: 2.36-Inch Cadence ZRS55 5.25-inch 4 ohm 2-Way Speaker System Power Handling: 60W RMS/180W Peak Frequency Response: 90Hz  22 kHz Sensitivity: 92dB @ 1w/1m Mounting Depth: 2.36-inch