Sennheiser hd open back

Sennheiser HD open-back headphones are a benchmark in professional and audiophile audio, combining high-precision dynamic transducers with an airy design that reproduces sound naturally.

About this subject

Sennheiser, founded in 1945 in Germany, built its reputation in the audio market with the HD series of open-back headphones. Models like the HD 600, launched in 1997, and the HD 650, from 2003, are considered timeless classics. Unlike closed-back designs, the open-back structure allows air to flow freely through the ear pads, reducing pressure on the ears and creating a wide, three-dimensional soundstage, ideal for mixing, mastering, and critical listening.

The technology behind these headphones includes specially tuned neodymium dynamic drivers for flat response and low distortion. The construction is primarily metal and high-strength plastic, with velour ear pads ensuring hours of comfort. The typical 300-ohm impedance requires a dedicated amplifier to perform optimally, making them semi-professional equipment. In recording studios, they are used as reference monitors by sound engineers.

Interestingly, the HD series was developed with input from musicians and mastering engineers over the years. The flagship HD 800 introduced the 'ring radiator' concept to eliminate internal resonances. While not the most portable or isolating, Sennheiser's open-back headphones remain the preferred choice for purists seeking sonic fidelity, with a strong presence in audio reviews and communities like Head-Fi.

Frequently Asked Questions

What is the difference between open-back and closed-back headphones?

Open-back headphones have grilles or vents that allow air to pass through, resulting in a more natural sound and wide soundstage, but they leak sound and provide little isolation. Closed-back headphones block external noise and prevent leakage, but may create pressure and a more closed-in sound.

Do I need an amplifier for Sennheiser HD open-back headphones?

Yes, models like HD 600 and HD 650 have 300-ohm impedance and moderate sensitivity, requiring a decent headphone amplifier for adequate volume and control. Without an amp, the sound may be weak or lack dynamics.

What are the main models in Sennheiser's HD series?

The most famous are HD 560S, HD 600, HD 650, HD 660S, and HD 800S. Each differs in sound signature: HD 600 is neutral, HD 650 slightly warmer, HD 800S has an enormous soundstage and extreme detail.