Boston Acoustics Horizon Series HS60 6.5" Bookshelf Speaker (Midnight) - Each Speaker (Discontinued by Manufacturer) 6.5" woofers and 1" soft dome tweeters Deep Channel Design (DCD) for more bass from less amplifier power Reduced Baffle Diffraction Design (RBDD) for wider, smoother dispersion Built-in wall mount brackets Recommended amplifier power: 10-150 Watts