The Sennheiser HD414 changed the landscape of headphone design in 1968. In those days hi-fi headphones were all big and bulky, closed-back designs, and the compact HD414 was the industry’s first “open aire,” on-ear (supra-aural) headphone. It looked, felt and sounded like nothing else and forecast the future direction of headphone sound.

The first generation white HD414s didn’t really click all the boxes, but the black ones with brilliant canary yellow earpads were something else. The sound and comfort more than lived up to the jazzy good looks.  A lot of people felt the same way, and Sennheiser sold more than 10,000,000 HD414s, making it the best-selling quality headphone of all time. Although it was designed as a consumer model, the HD414 was very popular with broadcast industry professionals as well.

The sound was smooth and clear. The HD414 liberated the sound that was up to that point stuck inside my head. Incredibly enough, it weighed just 74 grams, one quarter the weight of most full-size 2012 headphones. Best of all, the HD414 wasn’t an upper-class audiophile design, priced out of reach of the average audiophile. These headphones were originally retailing for under $50 dollars. 

The earliest models had a very high, 2,000-ohm impedance, and a few years later the impedance was reduced to 600 ohms. In 1995, the company’s 50th Anniversary Edition HD414 was a 52-ohm model, suitable for use with portable players. These are the headphones that are included in this sale. The company licensed Open-Aire technology to Sony for its first-generation Walkman headphones. Sennheiser ceased HD414 production years ago and no longer manufactures replacement drivers but still stocks earpads and cables. It should be noted that these headphones came equipped with the smaller, newer 3.5mm headphone jack, however, I have included a "slip on" for the larger 1/4" headphone jack intended for the larger traditional older amplifiers with the original headphone connection.