Sennheiser HD 650

Sennheiser HD 650 - Audiophile Hi-Res Open Back Dynamic Headphone

Pros and Cons

What We Liked

  • The HD650 has a remarkable even and linear frequency response, making it sound natural and transparent.
  • It has a lifelike timbre and offers great detail retrieval and high-resolving ability.
  • The HD650’s transient response is excellent due to its high frequency extension and low mass aluminum coil.
  • It has a solid phantom center and wide soundstage, providing a realistic and open spatial sound.
  • These headphones have low distortion, resulting in a pure, clean, and smooth sound.

What Can Be Improved

  • The HD650 is not as comfortable as the HD598.
  • The stock cables are heavy and can be cumbersome, causing discomfort when wearing the headphones.

Quick Verdict

The Sennheiser HD 650 is an exceptional audiophile headphone that delivers an incredibly balanced and natural sound with accurate timbre and great detail retrieval. Its wide soundstage and open spatial sound provide an immersive listening experience. Although it may not be the most comfortable headphone and the cables can be cumbersome, the HD650’s audio performance makes it a worthwhile investment for true high-fidelity sound. [Get the Sennheiser HD 650 – Audiophile Hi-Res Open Back Dynamic Headphone on Amazon.]

Unboxing – What’s Inside?

I recently purchased the Sennheiser HD 650 – Audiophile Hi-Res Open Back Dynamic Headphone on Amazon, as I was in search of a high-quality headphone for my music listening sessions. Being a music enthusiast, I wanted to experience the best sound quality possible.

The delivery was remarkably fast, especially considering I live in the USA. I received the package only two days after placing the order, which was impressive.

Upon opening the box, I found the following items:

  • Cable
  • Premium Adapter
  • Headphone


Here are the unique specifications of the Sennheiser HD 650:

  • Connectivity Technology: Wired
  • Form Factor: Over Ear
  • Color: Titan
  • Model Name: HD 650
  • Brand: Sennheiser Consumer Audio
  • Cable Length: 118 Inches
  • Number Of Items: 1
  • Units: 1.0 Count
  • Item Weight: 9.12 Ounces
  • Country of Origin: China
  • Language: English, French, Spanish
  • Manufacturer: Sennheiser
  • Department: music, instruments, instrument accessories
  • Date First Available: October 2, 2001
  • Is Discontinued By Manufacturer: No
  • Item Weight: 9.1 ounces


The documentation that came with the Sennheiser HD 650 proved to be invaluable in helping me set up and understand the features of the headphones. The user guide provided clear instructions on how to connect the cables, adjust settings, and optimize the sound experience. It also included useful tips on how to care for and maintain the headphones for long-lasting performance.

If you’d like to access the user guide yourself, you can find it here.

Features – What We Found

1. Precision Damping with Acoustic Silk

The Sennheiser HD 650 headphones are built with specially designed acoustic silk that ensures precision damping across the entire frequency range. This feature helps to reduce Total Harmonic Distortion (THD) to an incredible 0.05 percent, resulting in clear and detailed sound reproduction. The acoustic silk effectively controls unwanted resonances and vibrations, allowing for accurate and natural audio reproduction.

Pro-Tip: The precision damping provided by the acoustic silk allows for an immersive listening experience, making the HD 650 headphones ideal for audiophiles and professionals who seek high-fidelity sound.

2. Improved Frequency Response

With an improved frequency response of 10 to 39,500 Hertz, the Sennheiser HD 650 headphones deliver a wide range of sound, allowing you to hear the finer details in your music. Whether you are listening to low bass notes or high-frequency instruments, these headphones provide a balanced and accurate representation of the audio.

Pro-Tip: The extended frequency response of the HD 650 headphones ensures that you can enjoy a wide variety of genres and experience the full spectrum of sound in your favorite music.

Find the product here.

3. Hand Selected Matched Driver Elements

The Sennheiser HD 650 headphones feature hand-selected matched driver elements, ensuring consistent and accurate audio reproduction. Each driver is carefully chosen and paired to maintain uniformity in performance, resulting in a balanced and coherent sound signature across both ear cups.

This meticulous selection process guarantees that you experience the same level of audio quality in both the left and right earpieces, enhancing the stereo imaging and overall listening experience.

4. High Power Neodymium Magnets

The HD 650 headphones are equipped with high power neodymium magnets in their magnet systems. These magnets provide maximum efficiency, allowing for precise and dynamic sound reproduction. With the help of these magnets, the headphones can handle high power inputs without distortion, ensuring that the audio is faithful to the original recording.

Pro-Tip: The high efficiency magnets in the HD 650 headphones result in improved energy transfer, delivering punchy and impactful bass response, as well as clear and detailed highs.

5. Lightweight Aluminum Voice Coils

The Sennheiser HD 650 headphones feature lightweight aluminum voice coils that contribute to their fast transient response. This means that the headphones can quickly and accurately reproduce changes in sound, allowing for a more engaging and lifelike listening experience. The aluminum voice coils also contribute to the overall durability and longevity of the headphones.

By utilizing lightweight materials, the HD 650 headphones are able to produce precise sound reproduction across a wide frequency range, making them suitable for critical listening and professional use.

Scores and Review

Our Score: 91.0

I recently purchased the Sennheiser HD 650 – Audiophile Hi-Res Open Back Dynamic Headphone and I must say, it has exceeded my expectations. The sound quality is absolutely incredible. I have tried other headphones in the past, but none come close to the clarity and naturalness of the HD 650. The frequency response is well-balanced, with smooth highs, detailed mids, and punchy bass. I found that it brings out the finer details in the music that I’ve never heard before. It truly enhances the listening experience.

Comfort is also important to me when it comes to headphones, and the HD 650 does not disappoint. The ear cups are plush and fit snugly over my ears, providing a comfortable listening experience even during long listening sessions. The headband is adjustable and molds perfectly to fit my head, ensuring a secure and comfortable fit. The build quality is top-notch, with a solid construction that feels durable.

Overall, I highly recommend the Sennheiser HD 650 – Audiophile Hi-Res Open Back Dynamic Headphone. It offers exceptional sound quality, comfort, and build quality at a reasonable price. Whether you’re a music enthusiast or an audiophile, this headphone is a worthwhile investment. Click here to check it out on Amazon.

Still Looking? Checkout These Alternatives

The Sennheiser HD 650 – Audiophile Hi-Res Open Back Dynamic Headphone is a fantastic choice for anyone looking for high-quality audio. However, if you’re interested in exploring other options, here are some alternative products that you might consider:

  • Sennheiser HD 660S2 – Wired Audiophile Stereo Headphones: These headphones offer deep sub bass and optimized surround sound, providing an immersive audio experience. The transducer airflow and vented magnet system enhance the overall audio quality. You can find them on Amazon.
  • Sennheiser HD 800 S Over-the-Ear Audiophile Reference Headphones: With ring radiator drivers and open-back earcups, these headphones provide incredibly detailed and accurate sound reproduction. They also come with a balanced cable and a 2-year warranty. Check them out on Amazon.
  • Sennheiser HD 560 S Over-The-Ear Audiophile Headphones: These headphones offer a neutral frequency response and a wide sound field, thanks to the E.A.R. technology and open-back earcups. They also feature a detachable cable for convenience. They are available on Amazon.
  • HIFIMAN SUNDARA Over-Ear Full-Size Planar Magnetic HiFi Stereo Wired Headphones: Designed for studio and audiophile use, these headphones deliver exceptional sound quality with their planar magnetic drivers. They are a popular choice among music enthusiasts. You can find them on Amazon.

Each of these alternatives has its own unique features and strengths, catering to different preferences and needs. Whether you’re looking for enhanced bass, reference-grade audio, or a wide sound field, these headphones offer compelling options to consider. Dive into the world of high-fidelity audio and find the perfect pair of headphones that matches your listening preferences.