Goldwood Sound GW-15PC-4 Heavy Duty 4ohm 15" Woofer 550 Watts Replacement Speaker 1 Goldwood Sound GW-15PC-4 heavy duty 15" subwoofer, 275 watts RMS and 550 watts Max, 25 - 2100Hz frequency response, 95dB SPL, 4ohm 2" 4-layer aluminum voice coil, 75oz magnet with bumper plate and vented pole piece, poly-mica cone with rubber surround Die cast aluminum frame, overall size is 15.25", fits enclosure hole size of 13.75", mounting depth is 5.5", designed and engineered in the USA Use for pro DJ speakers, pro PA speakers, pro karaoke speakers, live sound speakers, fixed installation speakers, studio monitors and home audio speakers This listing and price is for 1 Goldwood GW-15PC-4 pro audio woofer