Sennheiser HD 550

• Pleasantly lightweight (only 237 grams) for long sessions
  
• Low clamping force = high wearing comfort
  
• Your ticket to a new world of detailed, audiophile sound
  
• Ideal for focused music enjoyment, movies, remote work, and gaming (microphone-ready)
  
• Irish-made 150-ohm transducers for open, natural sound from 6 Hz to 39,500 Hz
  
• Increased wearing comfort thanks to soft ear pads and ergonomic headband
  
• Designed for a long product life, repairable with original spare parts
  
• Includes drawstring bag and 1.8m cable
  
• Open-back headphones with high-quality metal mesh earcups
  

A new world of sound - detailed and authentic
Hear details you've previously missed. Be teleported directly into your favorite game. For all this and more, the HD 550 is your perfect companion – lightweight, comfortable, and ear-friendly.

Many well-known audio products deliver a "bathtub sound." This is because their frequency response curve resembles the cross-section of a bathtub, with heavily emphasized bass and treble at the ends of the frequency spectrum. Nothing against a nice bath – but unfortunately, "boosted bass and treble" means that the mids suffer. And then voices (which are often the most important thing in many recordings) sound powerless, while other frequency ranges drone unpleasantly.

The HD 550 is quite different. There are no acoustic peaks, dips, or "woolly" frequency ranges. And that means no voice or instrument in the mix is suppressed. You hear every detail of a recording – exactly as it was intended. In the sub-bass range, frequencies surprise you that are felt more than heard. The highs that the HD 550 can reproduce extend far beyond the human hearing range. And then there's the impressive spaciousness. A true high-end headphone gives you the impression that each individual note comes from a specific direction and even from a specific position. So not just "from the left," "from the right," or "from the center" – but also "near" or "far," in front or behind you. This three-dimensional hearing is something that evolution has given us, and in real life, we rely on it every day. A truly good pair of headphones can extract the same spatial experience from stereo recordings, games, and soundtracks.

Acoustic Magic
Developing a perfect pair of headphones is a balancing act. Those who dare to walk this tightrope should not be afraid of heights.

Many modern headphones rely on electronics to achieve the desired sound. Not so the HD 550: here you have a fully analog direct signal path from source to ear. This means pure, unadulterated sound without noise and artifacts. But this approach places the highest demands on the developers. Because where electronic "assistance" is not desired, the acoustics simply have to be right.

As a sonic foundation, they chose Sennheiser's excellent 150-ohm transducers in the proven HD 500 housing. These transducers are manufactured in their own factory in Ireland. To create the desired three-dimensional, spatial sound impression, the HD 550's transducers are angled backward towards the ears, which is closer to real-life hearing. The dust covers are acoustically transparent. Even the materials for the ear pads were selected for their acoustic properties. In addition, carefully placed foam elements ensure perfectly integrated treble reproduction and tight bass. The result is a neutral, balanced sound image that will not disappoint even the most demanding fans. The HD 550 sounds open and airy, but never harsh – and so pleasing that you won't want to spend a day without it!

So light and comfortable that you'll probably soon forget you're wearing it.
If there were a competition category for headphones called "best sound per gram of fighting weight" – the HD 550 would probably win it. Weighing just 237 grams, it's as light and subtle as possible.

During the development of the HD 550, people like you were listened to. And they said: "My headphones should be light and comfortable – and, of course, sound good." That's why a lot of energy and knowledge went into the headband, and high-quality artificial leather and softer foam were used. Due to the low overall weight, Sennheiser was also able to reduce the clamping force exerted on the head and ears. And that, in turn, allowed Sennheiser to use particularly soft and comfortable plush velour ear pads. And what do you get from that? Headphones that sit securely without constricting you – perfect for long music enjoyment and extended gaming sessions. So you can work, relax, listen to music, or play for as long as you want – without anything pinching or pressing, or your headphones needing to be charged. In short: the HD 550 is a companion you can grow old with.

Technical data – and what's behind it
The frequency responses of high-quality headphones look very different from the curves for loudspeakers, which are ideally very flat. Here you can see a clear rise on the right – in the highs – then it goes down again. But this comes very close to what is considered ideal for headphones. Because leading manufacturers base their goals on extensive psychoacoustic research into the subjective preferences of listeners.

For example, it turned out that headphones negate a function of the human auricle that normally boosts sounds in the 3 kHz range. The ideal transmission for headphones is therefore significantly stronger there. In addition, resonances in the inner ear make sounds louder in the 7 and 10 kHz frequency range, which is why the curve drops abruptly at around 8 to 9 kHz. Here we see that the HD 550 builds on the already excellent characteristics of the HD 599, venturing even further into the sub-bass range and yet offering powerful, unadulterated mids and brilliant highs without sibilance or harshness.

The frequency diagram shows all these qualities of the HD 550: solid, pleasantly powerful bass reproduction, balanced mids, and precise, airy highs. The frequency responses of high-quality headphones look very different from the curves for loudspeakers, which are ideally very flat. Here you can see a clear rise on the right – in the highs – then it goes down again. But this comes very close to what is considered ideal for headphones. Because leading manufacturers base their goals on extensive psychoacoustic research into the subjective preferences of listeners.

For example, it turned out that headphones negate a function of the human auricle that normally boosts sounds in the 3 kHz range. The ideal transmission for headphones is therefore significantly stronger there. In addition, resonances in the inner ear make sounds louder in the 7 and 10 kHz frequency range, which is why the curve drops abruptly at around 8 to 9 kHz. On the frequency diagram, we see that the HD 550 builds on the already excellent characteristics of the HD 599, venturing even further into the sub-bass range and yet offering powerful, unadulterated mids and brilliant highs without sibilance or harshness.

The frequency diagram shows all these qualities of the HD 550: solid, pleasantly powerful bass reproduction, balanced mids, and precise, airy highs.