LK is low frequency absorber which helps to bring under control low frequencies, eliminate standing waves and clarifies sound image in low frequencies. Made of high quality polyester makes it durable and resistant to external conditions. Designed for corners where often called "boomy" sound is mostly present. Often suppressed corners now can be treated properly and in conjunction with other Sonitus Acoustic products can make your space acoustically pleasant. Unobtrusive design and easy installation makes it suitable for most spaces. Absorption begins at 80 hz.