Sennheiser - This month in Sennheiser history – September 1968: We revolutionized the audio world with the first-ever open-backed headphones, the HD 414. For the first time ever, ears could hear in
Sennheiser on Twitter: "Since today is 4.14, we thought we'd honor the headphone that started it all – the iconic HD 414. Released in 1968, it went on to sell more than
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Sennheiser - #TB: In 1968, Sennheiser launched the HD 414, the world's first open-back headphones, which remain the bestselling full-size headphones of all time. Did you know that we still stock spares
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