Sennheiser’s HD 25 headphones are some of the most iconic heaphones in history, having been around through various revisions for over 30 years now. Its flexible, lightweight, and utilitarian design has made it popular popularity with DJs, broadcasters, and audiophiles alike. Its legendary durability and replaceable parts have also helped it stand the test of time in more ways than one. To the company’s 75th anniversary, Sennheiser has a few pleasant surprises for potential customers of the HD 25. First, the headphones will be on sale for $99.95 rather than the usual $149.95. More interestingly, Sennheiser is selling a limited…

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