Krk, 12sHO High Output Powered Studio Subwoofer that can produce high sound pressure levels is necessary for large and potent near-field studio monitors, and KRK's 12sHO is a strong and sonically pure addition to any studio setup. The 12sHO subwoofer can reproduce low-frequency detail and the demanding bass content of the LFE channel in both stereo and surround formats. Because the needs of these demanding applications are significantly higher than those of conventional low frequency drivers and power amplifiers, KRK created the 12sHO (HO for "High Output") as the industry standard for demanding mix scenarios of all kinds.