The Sennheiser HD 600 deliver a good and open sound for critical listening but aren't suitable headphones for everyday casual use. They're stable, comfortable and decently built. However, they're a little bulky, and their open-back design lets a lot of noise seep into your audio in loud environments. They also will disturb the people around you, with their loud leakage.
The Sennheiser HD600 are comfortable over-ear headphones with ear cups large enough to fit around most listeners' ears. They are surprisingly stable and will not easily fall off your head. Sadly, they don't offer any control options for your audio. The headband build quality is a little weak, and they feel a little too tight, which causes slight discomfort during long listening sessions. They're also not very portable and are a bit too bulky to carry around casually.
The Sennheiser HD 600 look very similar to HD 650 with a few differences in the headband design. These headphones have large open ear cups with a suede-like finish on the padding that gives them a premium appeal. They have a cool blue patterned finish that makes them stand out from the other models in the Sennheiser HD series.
The Sennheiser HD600 are comfortable but a little tight. They have large ear cups that easily fit around most listeners' ears. They're well padded and covered in a suede-like material that adds to their comfort level. Unfortunately, the headband exerts a little too much pressure on the head compared to the HD 650 and HD 598, which can get uncomfortable during long listening sessions.
The Sennheiser HD600 have an open back design that allows a fair amount of air to flow through the ear cups. That and the soft suede-like padding means you can have them on for extended critical listening sessions and not feel a big temperature difference after hours of continuous play. Simply put the tight fit of the headphones will be more noticeable over time than the gradual rise in temperature.
The Sennheiser HD 600 are big and bulky headphones that do not fold into a more compact design for transport. They're not made to be carried around often, and they do not come with a case to easily store them in your bag, which makes them less portable. The box they come in can be used as a substitute for a case. Unfortunately, it's far too large and cumbersome for regular use.
The Sennheiser HD600 have an average build quality. The open ear cups feel dense enough, to not crack or get damaged by a few falls. However, the headband feels fragile. Also, the metal frame that links the ear cups to the headband is connected by a thin joint that looks weak and feels susceptible to breaking under moderate physical stress.
These headphones are not designed for sports. However, they deliver a tight, stable fit that will remain in place during casual listening sessions and even during mild physical activities. They are not ideal for the gym due to their bulky design, but they offer a tight enough fit to be stable in most situations. The detachable cord, unfortunately, will not disconnect before yanking the headphones of your head if hooked on something.
The Sennheiser HD 600 are a very good sounding pair of open-back headphones. They have a good bass, although not as much as the Nad VISO HP50, a very good Mid Range and an excellent Treble. They also perform consistently across multiple users and have a good Soundstage due to their open-back design. However, they tend to sound a little muddy in the low-mid region and like most other open headphones, they lack a little bit of sub-bass.
The Sennheiser HD600 headphones are not designed to isolate listeners. Leakage is encouraged to improve their overall sound quality. Unfortunately, this means that whatever you're listening to, can be heard by the people around you, even at moderate volumes and on a bus. They also do not block much noise and will not fare well in loud environments.
Poor isolation. These headphones don't isolate any sound below 2KHz. Above 2KHz, they perform very poorly, failing to achieve 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.
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