Selenium D202TI Channel Studio Subwoofer, Blackultra-thin yet strong titanium diaphragm yields great overall performance FEA-optimized ferrite magnet for extended response and high efficiencyCCAW voice coil on advanced polyimide former Injected plastic phase plug eliminates phase cancellationsPrecisely engineered diaphragm and alignment mechanism for easy field replacement For use with industry standard 1-3/8"-18 TPI horns
