Db Technologies SUB 612 Active Bass-Reflex Subwoofer 600W RMS Power - 12"dB Technologies releases SUB 612 to complete SUB 600 active subwoofer family. The new model aims to create complete PA system making the most of dB Technologies' smaller full range systems such as OPERA 10 and B H 8 and 10. Just like 15" and 18" models of the family, bass reflex SUB 612 features a 600W RMS Class D Power Amplifier with SMPS, delivers outstanding sound pressure levels (up to 129 dB) in spite of a very compact housing (only 43. 65 lbs)