Boston Acoustics A 26 Two-Way Bookshelf Speaker with 6.5-Inch Woofer (Each, Gloss Black) Scratch-resistant high-gloss finish with contrasting "leatherette" accents for stunning good looks. Boston's 1-inch Kortec soft dome tweeter deliver smooth, extended high frequency response. Advanced ceramic/glass fiber polymer woofers in acoustically tuned ported enclosures feature Deep Channel Design (DCD) Easy hook-up 5-way gold-plated binding posts provide total hook-up flexibility Frequency Range 51Hz - 25kHz, recommended Amplifier 15 - 150 Watts Delivers improved bass response with less amplifier power. Crossover Frequency 2,400Hz Woofers 6-1/2 (165mm) DCD ceramic/glass fiber polymer woofer High-Frequency Driver 1 (25mm) Kortec Soft Dome Dimensions (H x W x D) 13 x 8-1/4 x 10-7/16 (330 x 209 x 265mm)