C350W/ C300W Corner Basstrap Professional sound quality that’s smooth and clear. With a high tensile inorganic coating, these corner bass traps are durable and effective. Made of superior polymer materials, it absorbs waves and echoes to give your space better sound acoustics. Top-notch build that eliminates usual drawbacks. Another great thing about it is that its decreased weight overcomes common drawbacks that come with standard corner bass traps. Using the wide open resonance box model, it effectively captures sound from 100 to 250 Hz, which removes usual issues caused by excessive low frequencies.