Martin Logan Motion Foundation B1 Bookshelf Speakers (Pair)FEATURES: Small in size but not sound, the most compact Motion Foundation model offers unheard of performance from such a versatile size. The Gen2 Obsidian Folded Motion Tweeter S, Folded Motion Waveguide, and 5. 5 aluminum mid bass driver work together here to create a completely unexpected and engaging experience from a compact footprint. Foundation B1 is ideal for small spaces, especially when combined with a subwoofer, to create a highly musical,