SE Electronics Project Studio Reflection Filter (Quick Review) Isolate your vocals or acoustics the right way. Made with high density 'crystal' foam that offer extremely good acoustic absorption.After 3 years and many poor imitations of our now industry standard design, we have gone back to the drawing board to produce what many budget concuos customers have so desired... an entry level Reflexion Filter product which actually does the job properly! Due to patents pending on our original design, competitors who have tried to emulate the success of the original RF Pro have not managed to do so succesfuly since their designs are limited, and as a result, so are their performances.The Project Studio RF uses the same basic design as the Pro version, and while it can never be fully as effective as its more expensive big brother, it easily ouut performs copies and for project studio use is just the job. The metal frame is lined with the same patented polyester fiberboard as the Pro version uses for its outer layer. This material has extremely good acoustic absorption properties; much better than simple foam products. This is then further lined with a high density 'crystal' foam with curved undulations rather the cheaper and less effective ribbed, medium density foams that are widely used by other companies.The result is a product which looks fantastic and 'sounds' even better when recording vocals and acoustic guitars... its not an RF Pro, but it's the best of the rest!