heres the specs.

Size (IN.,CM) 15, 38.1
Impedance (OHMS) 2 or 4 DVC
Max Rec Amplifier Power (WATTS PEAK/RMS)* 1500/750
Sensitivity (dB 1w/1m) 87.8
Frequency Response (Hz) 18-100
Mounting Depth (IN.,CM) 8-5/8, 21.9
Mounting Cutout, Square (IN.,CM) 13-3/4, 34.9
Min Rec Sealed Box Volume (CU. FT., Liters) 1.5, 42.5
Max Rec Sealed Box Volume (CU. FT., Liters) 6.0, 169.9
Min Rec Vented Box Volume (CU. Ft., Liters)** 3.0, 85.0
Max Rec Vented Box Volume (CU. Ft., Liters)** 6.0, 169.9