Amazon.com: EMB Professional 12" 1200W SB-12 Replacement Speaker for JBL, Peavey, Cerwin Vega, Gemini, EMB, BMB, Pyle-Pro, Mr.DJ & Many Brands! Protects the woofer and speaker in open installations.
Cardo JBL Replacement Speakers 45mm by Atomic-Moto
MR DJ PA DJ 15" Replacement Driver Woofer Subwoofer Speaker For JBL PRX415M 1500W - Walmart.com
Amazon.com: Harmony HA-P15WS8 Replacement 15" PA Speaker 8 Ohm Woofer Compatible with JBL JRX215 : Musical Instruments
NEW 6.5" 6 1/2" inch OEM Woofer replacement for JBL Speakers 8 ohm 200W Vintage | eBay