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Quote:
Sennheiser claims they introduced the first open headphone - the HD 414, in 1968.
Sennheiser Worldwide: Microphones, Headphones and Wireless Systems
Of course, the concept of vented enclosures for speakers was well before that - I think there was a patent in the 30's from Bell Labs.
| Originally Posted by yumigator /img/forum/go_quote.gif I highly doubt that Grado actually invented the concept of open headphones. |
Sennheiser claims they introduced the first open headphone - the HD 414, in 1968.
Sennheiser Worldwide: Microphones, Headphones and Wireless Systems
Of course, the concept of vented enclosures for speakers was well before that - I think there was a patent in the 30's from Bell Labs.
