Bought a copy of the 25th Anniversary edition of KOSS Porta Pro. This variant differs significantly from the previous one not just because of the bright packaging and medal, but also because the thin wiring, which was the source of many complaints from owners, has been reinforced with a textile casing. The end effect gives the impression of more strength and solidity. I'm also crossing my fingers that the anniversary headphones were put together with extra attention and end up being even better than the "serial" examples.
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