>> we attribute our success as i say often to stubbornness and stupidity. >> stubborn because when many other cassette tape manufacturers surrendered in the battle with compact disks, they cranked up the volume literally. she crisscrosses shop floor hundreds of times a day filling orders from around the world. >> i wear out a lot of shoes. >> we're too busy to stop. >> why are consumers listening to audio cassettes again. >> you hear the warmth and presence in an analog recording you will not hear in a digital recording. >> how old is this stuff? >> 1970s. almost new equipment by our standards. >> he bought up everyone else's old equipment and brought it to springfield missouri hq. with binder time keeps it running. >> i was a geek before there