NHT SuperOne 2.1 Bookshelf Speaker (Single, Black) Bookshelf 2-way speaker delivers true audiophile-quality sound Sealed enclosure for deep, lifelike, musical bass 6.5-inch long throw pulp cone woofer 1-inch silk dome tweeter. Cabinet Material - 0.5 mm vinyl laminate exterior Compact, well-braced cabinet virtually eliminates resonance