SVS Ultra Evolution Bookshelf Speakers (Pair) SVS Ultra Evolution Bookshelf Speaker represents the culmination of SVS breakthroughs in driver design, component materials, and cabinet architecture, married with a relentless passion for audio excellence. The science of sonic perfection in harmony with a love of convincing and immersive sound. With a big, expansive sound that's revealing and detailed, Ultra Evolution Bookshelf gives the impression of a much larger speaker without sacrificing refine