Features: Power Handling: 150W RMS, 600W MAX 11” Amplified Shallow Spare TIre Subwoofer Solid Non Resonant Die Cast Enclosure Construction Impedance: 2 Ohm Frequency Response: 20-150Hz Fits Most Vehicles Without Removing Spare Tire Dimensions: 14.2” x 4.92” (360 x 125 mm) Specifications: Subwoofer Size: 11 Inch Nominal Impedance (ohms): 4 4 Ω RMS Power Rating: 150W Max Power Rating: 600W Fs-Free Air Resonance (Hz): 20-150Hz Dimension – Length x Width x Height – Inches(mm): 14.2” x 4.92” (360 x 125 mm)