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noisier and lacked bass frequencies compared to conventional records, and also had more "rumble" (low frequency noise) than conventional records. While RCA claimed that
Dynaflex records were less noisy and less susceptible to warpage and would last longer than conventional vinyl records, some consumers (particularly classical listeners) derisively referred to the new product as 'Dynawarp' because of evidence that Dynaflex records were prone to warp on dealers' shelves, just from the pressure of the shrinkwrap on the album jacket. Some critics charged that Dynaflex was nothing more than a ploy devised by RCA to save money by using less vinyl than in traditional, thicker records.
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measure, most industry record pressing plants were using recycled or "reground" vinyl, taking old and unsold records, cutting out the center with the paper labels, then melting the rest down and reusing the material to make new records. Such "reground" vinyl records typically sounded much noisier and scratchier when played than a record made from new or "virgin" vinyl; collectors noted that records pressed from "reground" vinyl sometimes had small remnants of paper labels or other materials embedded in them.
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RCA Records apparently never fully implemented the use of
Dynaflex, as regular thicker vinyl records continued to be manufactured; many titles issued by RCA were available in both Dynaflex and heavier vinyl pressings. Around 1974–75, RCA began to gradually reduce the number of Dynaflex records being
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Opinions from record collectors and audiophiles are divided as to the sound quality of
Dynaflex records. Some felt that the sound quality actually improved, due to the purer vinyl used, and better processes for removing impurities in the vinyl compounds; others felt that Dynaflex pressings were
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in late 1969. Rather than using the stiff plastic material used by conventional vinyl pressings, Dynaflex records used a softer, pliable formulation that allowed RCA to use less material, saving money and also making the record appear to lie flatter on turntables. At the time, as a cost-cutting
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RCA's
Dynaflex records varied somewhat in thickness, but most literally "flopped" back and forth when held between the hands. Some were so thin and flexible they could actually be bent nearly in half. This flexibility also gave them theoretically more resiliency in shipping, resulting in fewer
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manufactured and by the end of the decade, Dynaflex had been discontinued entirely.
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Trademark for thin, lightweight vinyl LP record (1969–1979)
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