10 Digital Designs Dual Vented Enclosure Subwoofers designed for optimum bass response and low-frequency reproduction which is ideal for lower profile sound quality subwoofers. 1” High-Grade MDF Front Baffle for Ultimate structural rigidity and no-flex construction 0.58 Cubic Feet Net Volume internal air space is ideal for tight accurate bass reproduction CNC Miter & Dado design and construction for the ultimate in an airtight precision fit of all parts which ensures a rattle and noise-free environment. Recessed Side Panels increase structural integrity eliminates unwanted flex and vibration.