Acoustic suspension arrived in the loudspeaker marketplace in 1955, making it possible to get low bass from a small, bookshelf-sized enclosure. This seriously affected the sales of "big box" speaker systems of all brands. Rudy Bozak never offered an acoustic suspension speaker system; he stated that the full transient response and clean bass for which his woofers were famous could not be obtained with the heavier, reinforced woofer cones necessary for acoustic suspension. Bozak began offering smaller speaker systems to answer consumer demand, but none were noted for exceptional performance until the LS-200 and LS-200A of the late 1970s.