Listen to quality audio and smooth, refined sound with this MartinLogan Motion bookshelf speaker. The powerful bass technology delivers rich low tones, and the lightning-fast, lightweight tweeter diaphragm ensures clarity and good dynamic range. The flexible installation of this MartinLogan Motion bookshelf speaker gives you tabletop, wall-mounting and upside-down placement options. | Martinlogan | | Motion 4" 75-Watt Passive 2-Way Bookshelf Speaker (Each | Gloss Black | Best Buy