![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 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](https://pbs.twimg.com/media/EVjkA7lXQAEuaCB.jpg)
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
![Amazon.com: Black Earphone Cable Headphone Extra Cable for Sennheiser HD 25-sp HD 222 HD 224 HD 230 HD 250 HD 250 Linear II HD 414 HD 414 SL : Electronics Amazon.com: Black Earphone Cable Headphone Extra Cable for Sennheiser HD 25-sp HD 222 HD 224 HD 230 HD 250 HD 250 Linear II HD 414 HD 414 SL : Electronics](https://m.media-amazon.com/images/I/4132Z-Tzm-L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Black Earphone Cable Headphone Extra Cable for Sennheiser HD 25-sp HD 222 HD 224 HD 230 HD 250 HD 250 Linear II HD 414 HD 414 SL : Electronics
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
![29% Price Drop on Sennheiser HD414 Headphones with Replacement Ear Pads and 2 Replacement Cords | Reverb 29% Price Drop on Sennheiser HD414 Headphones with Replacement Ear Pads and 2 Replacement Cords | Reverb](https://images.reverb.com/image/upload/s--CqzFUz-h--/f_auto,t_large/v1552065665/hsdd6dftedgnrokjdvso.jpg)
29% Price Drop on Sennheiser HD414 Headphones with Replacement Ear Pads and 2 Replacement Cords | Reverb
![Frequency responses of the HD414 Classic. See captions of Fig. 3 for an... | Download Scientific Diagram Frequency responses of the HD414 Classic. See captions of Fig. 3 for an... | Download Scientific Diagram](https://www.researchgate.net/publication/237208443/figure/fig10/AS:668754983809036@1536455021507/Frequency-responses-of-the-HD414-Classic-See-captions-of-Fig-3-for-an-explanation-of.png)