JBL Stage 600C 6-1/2" component speaker system at Crutchfield
JBL stage 600c - YouTube
Amazon.com: 5 CORE 15 Inch Subwoofer Speaker 2200W Peak High Power Handling 250W RMS 15" Replacement 8 Ohm Pro Audio DJ Sub Woofer w/CCAW Voice Coil Steel Frame 90oz Magnet 15-185 MS