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18 Inch Professional Subwoofer Speaker Pro Loudspeaker For Audio Equipment 8 Ohm - Speakers - AliExpress
Amazon.com: Alphasonik 18" Flagship Series 3000 Watts Raw Sub Woofer Speaker Cast Aluminum Basket Driver for Pro Audio PA DJ Cabinets Subwoofer with High Handling Power Extremely Clear and Loud - FW1832 :
STLF-18AS | 18" 750W Cast Aluminum Frame Woofer (Low Frequency Driver) – Sound Town
One unit (not pair) |18 Inch Woofer for Bass Compensation of Open Baffle or Cabinet | W-18 - Lii Song (Lii Audio), unique speaker, amplfier, quality and cost-saving parts for HiFi DIY