DS18 PRO-DKH1S 2"Bolt On Throat Compression Driver 2" Throat Titanium VC and PRO-HA52/BK Horn 640 Watts 110 Db 8 ohm Mounting Depth 4.9" The DKH1S includes the DS18 DKH1 driver plus our newly redesigned shorty throat so you only need 4.9 inches mounting depth to mount these ear ripping drivers. The new throat is aluminum with brilliantly brushed DS18 logos and made for maximum directional efficiency. With an AES power handling of 160w and Peak at 640w you will be sure to draw everyone's attention to your audio! Highlights Aluminum "Shorty" throat with brushed DS18 logos for an amazing look and great fitment. DKH1 Driver with an AES rating of 160 watts and Peak of 640w for super loud and vibrant highs with a Titanium 8 ohms voice coil. 4.9 inch mounting depth and 5.3 inches total mounting depth so you don't need a large amount of mounting depth like other traditional driver and throat combinations. Technical Details PRO-DKH1S Product Manual Throat Diameter 2"/50.8mm Installation Type Bolt-on Nominal Impedance 8 Ohms Program Power Handling 320W Peak Power Handling 640W AES Power Handling 160W Sensitivity 111dB Frequency Response 630Hz-20KHz Recommended HI Pass Crossover 900 Hz Motor Voice Coil Diameter 2.03"/51mm Voice Coil Former Material Kapton Winding Material CCA Diaphragm Material Titanium Magnet Material Ferrite Magnet Weight 35oz Measurements Overall Diameter 7"/180mm Overall Depth 5.3"/134.7mm Bolt Pattern/Type 5.5mm hole-6.3"/161 mm Diameter Mounting Depth 4.9"/125.8mm Mounting Hole Diameter 5.7"/145mmm