pkg HCX 165 - Hertz 6.5" 100W RMS Hi-Energy Coaxial Speakers + Arc Audio 5.25" to 6.5" Speaker Adapter Rings For Motorcycles HERTZ HCX-165: 2-Way (6.5" Coaxial) | Mounting depth: 146 mm | Tweeter: 20 mm Neodymium Tetolon dome tweeter | Power handling: 100 - 200 Watts | Frequency response: 50Hz-22kHz Sensitivity: 92 dB. | Impedance: 4 Ohm | Magnet Size: 85 mm | Pure Copper Voice Coil Wound on a KSV former | Damped Mesh Fibre Cone Anti-Vibration rubber magnet cover | Loss-less Polymer Rubber Surround | Rotary High Frequency Contour | Xmax: 3 mm | Fs: 70 Hz Arc Audio 6.5" Spacers: Bolts to factory speaker mounting points | Made from Hi-Temperature reinforced ABS | Inner acoustical ridge molding minimize cancellation and improving midbass response No cutting or modifying necessary | Mounting hardware included | Heavy duty mating flange for clean and precise fitment