Notable features and materials used in MB Quart’s new WideSphere™ inverted dome tweeters include; RoHS certified pure Titanium, MB Quart BTT cooling, self-damped Puron open-cell structure micro-foam surround suspensions, hi-flux density N40H rated Neodymium, dual-layer CCA Voice Coils formed on precision aluminum formers, resulting in a massive power-handing increase three times higher than the previous 1-inch titanium convex dome MB Quart tweeter.