8” Digital Deaign DD Audio SW2508-D4 Subwoofer for Sale in Oakland, CA - OfferUp
Digital Designs DDLE-mini8 Passive Subwoofer - Adam Rayner Talks Audio
DD Audio - "Overall Digital Designs has developed a winner of a pre-built sub here." Read the full review by Australian Magazine "In Car Entertainment". Read now: http://goo.gl/cXcG6h | Facebook
DD AUDIO 1108-D2 8" USA MADE WOOFER 800W DUAL 2-OHM SUBWOOFER BASS SPEAKER NEW | eBay
DD LE-M10 subwoofer - Up close and personal - YouTube
DD AUDIO 1508d-D4 8" USA MADE WOOFER 2400W DUAL 4-OHM SUBWOOFER BASS SPEAKER NEW | eBay
Down4sound PRO-FAB 8 | 8 Sub Box | Single 8-Inch Ported Subwoofer Enclosure Box - Down4Sound Shop