The Sennheiser HD 650 deliver an excellent and open sound that's great for critical listening. They're comfortable and decently built. Sadly, they're only average as everyday, casual headphones. The open-back design lets noise seep into your audio and leaks a lot. They will be distracting to the people around you, even at moderate volumes.
- Great audio reproduction.
- Above-average soundstage.
- Comfortable and stable design.
- Leaks a lot.
- Poor noise isolation.
The Sennheiser HD 650 are decently designed headphones with large comfortable earcups. They're less tight than the HD 600, which reduces the clamping sensation you feel during long listening sessions. Sadly, this also makes them slightly less stable on your head. They offer no audio control options, and they're also a bit too bulky and may require a bag to carry them around.
The Sennheiser HD650 have the same design as the HD 600 with a few minor differences. They have a two-tone, dark gray and black color scheme with a glossy coating. The large open ear cups have a suede-like finish on the padding that gives these headphones a premium appeal. They do not look as eye-catching as the HD 600 because of their slightly bland color scheme, but the style will work for some.
The Sennheiser HD 650 are slightly more comfortable than the HD 600. Like the previous model, these headphones have large ear cups that fully encompass most ears. They are also covered in a suede-like fabric that feels good on the skin and adds to their overall comfort level. The headband design is better than the HD 600, it's not as tight, and it's better padded.
The Sennheiser HD650 are a little less stable than the HD 600 because they have less tension in the headband. They stay in place during casual listening sessions and are stable enough for some low-intensity, physical activity. However, they are not designed for sports, and the slightly looser headband may cause them to fall off your head if used while running. The detachable cable will also pull the headphones of your head before it disconnects from the ear cups, which is slightly disappointing.
These headphones are not designed to be very portable. They're large and bulky and do not fold into a smaller format for transport or easy storage. They also don't offer a dedicated case or pouch to carry the headphones in, which is slightly disappointing. Although the box they come in could be a substitute for a case, it's too big and impractical for regular use.
The Sennheiser HD 650 are a very good sounding pair of open-back headphones. They have a very good Bass, a good Mid Range and a very good Treble. They also have a good Soundstage and perform consistently across multiple users due to their open-back design. However, they tend to sound a little muddy in the low-mid region and they lack a little bit of sub-bass. Compared to the HD 600, the Sennheiser HD650 has a bit more sub-bass and sounds slightly veiled in the Treble.
Very good bass range performance. LFE is at 40Hz, which is good, but low-bass that is responsible for thump and rumble, is lacking by 4dB. High-bass is over our target by more than 2dB, adding a bit of boominess to the sound.
Great mid range performance for the Sennheiser HD 650. The entire range is nearly flat, but over our target by 2.5 dB, making the mid-range of these headphones slightly dominant.
Excellent treble range performance. Low-treble and mid-treble are flat and consistent, but with a 5dB tilt favoring lower frequencies. This results in a treble that lacks a bit of presence and brilliance.
Above average consistency. Due to the open-back and ear pad design, the Sennheiser HD650 has near perfect consistency in delivering its bass. However, they are prone to inconsistency in the treble range, depending on the positioning and ear shape.
Very good soundstage. Due to the open-back design and ear cup size, the Sennheiser HD 650 has an open and spacious soundstage, however, their soundstage will most likely be perceived as located inside the head.
Above average imaging. Phase error is minimal, especially in the treble range. However, the drivers of our test unit showed 1.6dB of mismatch in amplitude, and 26 degrees of mismatch in phase. This would have a subtle but noticeable effect on the imaging of these headphones.
Very good harmonic distortion performance. The overall amount of harmonic distortion in the mid and treble ranges are very low, regardless of the volume. However, THD in the bass range is slightly elevated and is affected an increase in volume.
The open-back design of the Sennheiser HD 650 encourages leakage to improve sound quality. However, this means they leak a lot and will disturb the people around you at moderate volumes, even on a bus. They also won't block any ambient noise from seeping into your audio and won't fare well in loud environments or on a noisy commute.
Poor isolation. These headphones don't isolate any sound below 2KHz. Above 2KHz, they perform poorly, failing to deliver more than 10dB of overall attenuation in the Treble Range.
Poor leakage. These open headphones leak a lot of sound throughout a broad range of frequencies. The leakage starts to become noticeable around 300Hz and remains so up to 20KHz.
- 100% SpNR
No active features.
No compatible app.
In the box
- Sennheiser HD 650 Headphones
- 1/8" to 1/4" Adapter
- Audio cable