inputs.text: 9 years still love headphones - bought pair mdr7509s fall 2001 sophomore studying music recording told purchase pair professional headphones editing opted pay 7509s 7506s classmates buying several features first cans go 5hz low frequency youre really hearing skull ears fact could reproduce 20hz important not like mixing subwoofer second headphones peak 3w get loud able handle much power important larger drivers 7506 40mm 50mm first years ownership watched classmates abused 7506s broken later became studio tech constantly cursing 7506s used tracking always breaking lucky one repair 9 years ownership ive finally perform first repair mine cable worn 35mm plug sadly cut nice threaded plug replaced cheaper gold one could found threaded 35mm jack solder id happier unfortunately repairing sony 35mm threaded plug nearly impossible glue whole assembly together destroy get apartthe sound 7509 great flat still full ive tried many headphones years runner far mdr7506 beyerdynamic makes great headphones not get nearly loud enough tracking akgs pro cans junk constantly falling apart sennheisers arent bad ive not tried large diaphragms every time ive ever used lesser pair headphones years ive wished mefrom ive read sounds like newer 7509hd model not good disappointing money would buy 5 pairs recording studio hope keep going next 25 yearstravis funkowner producersteele street studiodenver coloradopointing money would buy 5 pairs recording studio hope keep going next 25 years travis funk owner producer steele street studio denver colorado