Specifications 8 Goldwood Sound GW-406D Shielded 6.5 Subwoofers 60 Watts RMS and 90 Watts Max each 59 - 6000Hz Frequency Response 85 dB SPL 8 Ohm Impedance 1 Aluminum Dual Voice Coil per woofer 10oz Magnet plus 10oz Bucking Magnet per woofer Poly laminated Cones with Rolled Foam Surrounds Stamped Steel Frames Fully Shielded Overall Dimension is 6.5 per woofer Fits Enclosure Hole Size of 5.75 Mounting Depth is 3.25 Designed And Engineered In USA Applications: Pro DJ Speakers Pro PA Speakers Pro Karaoke Speakers Live Sound Speakers Fixed Installation Speakers Studio Monitors Home Audio Speakers This Listing and Price is for 8 Goldwood GW-406D Pro Audio Subwoofers