Diamond Audio MS69CX

6X 9 2-WAY High Output Coaxsub Speaker System,Pair Nominal Impedance (ohms)4Frequency Response45-23kHzVoice Coil Diameter (inchmm)1.4 (35.5)Fs-Free Air Resonance (Hz)46HzVas (Liter)0.159 (4.5)Qts0.783Sensitivity (1W1M)90.5dBSensitivity (2.83V1M)93.5dBXmax - Inch(mm)0.16 (4)Mounting Diameter (inchmm)8.875 (225.5mm) x 6.125 (155.6mm)Mounting Depth3.875 (98.425mm)