Best home made 5 1/2 inch subwoofer box : r/audiophile

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DD AUDIO 1506-D4 6.5 USA MADE 2400W DUAL 4-OHM CAR SUBWOOFER BASS SPEAKER NEW

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Definitive Technology DT8LCR DT Series 8 White 2-Way In-Wall Speaker Performance, invisibility and ease of installation make the DT8LCR the perfect in-wall speaker for stealth home theaters and hidden multi-room systems. Optimized for superior quality and sound, every component in this custom install loudspeaker was developed from scratch for a listening experience that delivers and a product that endures. Because with the DT Series, good enough is never enough.

Definitive Technology di 6.5LCR Disappearing In-Wall LCR Speaker