HK Audio FINEO FO 10 Install Speaker BEM Opti Horn Rotate 8 ohm (Black) - 10"If youre looking for compact dimensions and balanced sound with crystal clear HF and expressiveness in the mid and lower frequency ranges without compromise, the FO 10 is a perfect choice. The combination of a 10 woofer with a 1. 75 voice coil and the rotatable constant directivity horn from the CONTOUR X series, which was developed for the rough and tumble of touring, with a powerful 1 compression driver, results in an assertive full range solution