The strength of this exceptional loudspeaker is its absence of compromise. The InRoom Platinum LCR can resolve the subtlest musical detail with effortless accuracy, but when called upon, can reproduce the most powerful movie soundtrack at theatrical levels in virtually any size room, from a family room to a large screening theater. he cabinet is built extremely solid, and is acoustically inert. It contains revolutionary internal technologies that disperse speaker back waves before they can add distortion by reflecting back through the speaker cones. Expensive proprietary drivers from Scan-Speak and Seas were chosen for their accuracy, output, and reliability. Efficiency is high at 94.5 dB. We know of few other speakers that will play this loudly that sound this good. Where sound quality for both movies and music is crucial, Platinum is the only choice.