Specifications 2 Goldwood Sound GW-15PC-4 Heavy Duty 15 Subwoofers 275 Watts RMS and 550 Watts Max per woofer 25 - 2100Hz Frequency Response 95 dB SPL 4 Ohm Impedance 2 4-Layer Aluminum Voice Coil per woofer 75oz Magnets with Bumper Plates Poly-Mica Cones with Rubber Surrounds and Vented Pole Pieces Die Cast Aluminum Frames Overall Dimension is 15.25 per woofer Fits Enclosure Hole Size of 13.75 Mounting Depth is 5.5 Designed And Engineered In USA Applications: Pro DJ Speaker Pro PA Speaker Pro Karaoke Speaker Live Sound Speaker Fixed Installation Speaker Studio Monitor Home Audio Speaker Car Audio Speaker This Listing and Price is for 2 Goldwood GW-15PC-4 Heavy Duty Subwoofers