ES-0690 GOLD - CDT Audio 6"x9" Way Extended Mid-Bass Speakers / Subwoofers ES0690 1 pr GOLD 6X9 carbon fiber subwoofer Mounting depth: 3.5 Dimensions: 6.625X 9.25 Ellipse (168.3mm X 235mm) Ellipse (Exclusive of mounting tabs) 6 X 8.625 Ellipse (152.4mm X 219mm) Ellipse Free Air use mount in rear deck, large door or panel.