Check the listing for details. Primacoustic Stratus Broadband Ceiling Cloud Black. Color: Black, Condition: New. Listed at 394.99 USD. The Primacoustic Stratus Ceiling Cloud is an acoustical device that suspends above the recording console to control early reflections, flutter echo and help eliminate standing waves that cause resonant peaks in the critical mix position. Once in place, you will immediately enjoy a more controlled and intimate acoustic environment, larger sweet spot and reduced ear fatigue.Attractive and very affordable, the Stratus acoustic cloud ships in kit-form and is easily put together in minutes using a simple screw driver. The kit includes a 2" thick, 24" x 48" acoustic panel made from high density 6-lb. per cubic foot fiberglass and suspension hardware. The fiberglass is encapsulated in a micromesh, and the edges are resin treated to retain the minute fibers.