Tang Band 13-1761S 1/2 Silk Dome Tweeter Pair Tang Band's 13-1761S features a highly damped fabric diaphragm, neodymium magnet, and ferrofluid cooling. The tweeter's housing is small enough to fit within a 20 mm voice coil -- great for coaxial projects or anywhere a micro HF driver is required. Extremely smooth frequency response. Sold in pairs. Tang Band 13-1761S Specifications: Power handling: 3.5 watts RMS/50 watts max VCdia: 1/2 Impedance: 8 ohms Re: 7.0 ohms Frequency response: 4,000-20,000 Hz Fs: 4,000 Hz SPL: 88 dB 1W/1m Dimensions: Overall diameter: 0.77, Cutout diameter: 0.77, Depth: 0.71.