The JBL's LSR6312SP 12" powered studio subwoofer system delivers low frequency extension and advanced bass management. Electronic management of response peaks caused by room modes is provided by JBL's proprietary Room Mode Correction (RMC) circuit. To make setup easier, the RMC calibration kit is included in this powered speaker. Power compression is kept to a minimum thanks to the innovative Differential Drive. The additional third coil, which acts as a dynamic brake, reduces audible distortion at high working levels. With a sophisticated LCR bass management system, direct LFE input, a high density baffle, and a Linear Dynamics Aperture port, user receive even more help in the crystal clear audio domain.