New Wave Audio BK-52 2-Way Bookshelf Speaker: * Shielded 5-1/4" woofer and 1" treated silk-dome tweeter * 8-ohm system impedance * High efficiency: 87 dB * Frequency response: 55Hz to 20kHz * Tweeter level control * Black fabric grill * Tuned port enhances efficiency * 2-way speakers can handle up to 100 watts of power or 50 watts RMS * 2-way bookshelf speaker has a shielded woofer to prevent magnetic interference with CRTs and other electronic devices * Finish: Black oak