Monster bass trap with flexrange technology is most effective, raising the bar for bass traps. Measurement in a resolution of say and write 167 mm thick, the design of the Monster Bass Trap with flexrange technology allows use in different sizes to absorb as much bass as possible without having to worry about the high end living in the room. With the bass trap "Monster with flexrange technology, low end becomes clearer, easier. No more guessing on bass levels in the mix. Solution for more to clean up ugly nulls and spikes common in all rooms. Certified lab testing, the Monster Bass Trap with flexrange technology has a rating of 24 sabins per unit - 50% more effective than 244 bass trap with flexrange technology.