Reference bookshelf speakers with flawless tonal balance, stunning dynamics, unveiled highs and amazing low frequency extension. The Ultra Bookshelf speakers perform in the echelon of the world's finest audiophile and home theater loudspeakers, yet cost a fraction of the price. 6.5-inch mid-bass drivers feature composite glass-fiber cones that yield excellent stiffness to mass ratio for enhanced sensitivity and voicing that's transparent and completely faithful to the source material. 1-inch aluminum dome tweeter is light, efficient, and rigid, and plays crystal clear at high volumes. The clarity offers a sense of transparency, while offering an 'airy' presentation so vocals, dialogue and musical content always sound crisp, smooth and natural. A proprietary SVS SoundMatch 2-way crossover enhanced by expertly refined topology ensures accurate frequency response and silky-smooth transitions between drivers as well as pinpoint imaging and phase coherency.