Selenium D220Ti 1-Inch 8-Ohm Titanium Horn Driver The D220Ti-8's ceramic magnetic assembly effectively concentrates flux in the gap, and highest motor strength efficiency is achieved through the use of FEA (Finite Element Analysis). Specifications: Power handling: 80 watts RMS/160 watts program (with recommended 2,000 Hz, 12 dB/octave crossover) VCdia: 1.7" Throat diameter: 1" Impedance: 8 ohms Frequency response: 1,000-21,000 Hz (no crossover) SPL: 109 dB 2.83V/1m Magnet weight: 24 oz. Dimensions: Overall diameter: 4.53", Depth: 2", 2.75" including threaded "nose".