Boston Acoustics A 360 Dual 6.5-Inch Woofer Three-Way Floor Standing Speaker (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 Woofers in acoustically tuned ported enclosures feature Deep Channel Design (DCD) deliver improved bass response with less amplifier power. Frequency Range 38Hz - 25kHz, recommended Amplifier 15 - 200 Watts