Dayton Audio PA255-8 10" Pro Woofer Dayton Audio PA Series Pro Woofers are a great upgrade for musical instrument or sound reinforcement cabinets, and also excel in custom-built speaker systems. High power handling, smooth response, low distortion, deep punchy bass, and rugged reliability are the features that set PA Series woofers apart from other drivers – premium performance, but value priced. Highlights Strong, low-mass carbon fiber impregnated paper cone I-beam rolled edge 1.2 mm steel frame Low distortion motor system w/copper cap Powerful 50 oz. ceramic ferrite magnet Vented pole piece/vented voice coil gap improve thermal management Black motor parts and black polyimide voice coil former dissipate heat Bumped back plate for unrestricted excursion