KLH 6.5" 2 Way Bookshelf 100 Watt Max Power BTF-220 Speakers Design: Bass Reflex, Finish: Black Wood grain, Grill: Black Cloth Removable Woofer: 6.5 Polymer Coated Molded Fiber Tweeter: 5/8 Polycarbonate with Ferrofluid Suggested Amplifier Power: 5-100 Watts Frequency Response: 80Hz to 20kHZ, Sensitivity: 87dB @ 1W-1M, Impedance: 8 Ohms Average, Crossover: 1st Order High Pass