Sennheiser PXC 550 vs Audeze LCD-4

The feature works really well in preventing outside noise from intruding into your music listening experience. Also, there are very little to no reports of a feeling of pressure in the ears when the feature is active.

The sound tuning of these headphones is focused on the lower frequencies. The bass is quite powerful with good sub-bass extension. Users who listen to a lot of hip-hop, dance and bass-heavy music will certainly enjoy the oomph that these headphones can give. The mids sound natural and smooth, yet the lower regions of these frequencies can be overwhelmed by the powerful bass. The highs are crisp and clear though, which prevents the sound from getting too muddy.

Soft foam and leather are used in the interior and exterior of the ear pads respectively which makes them feel really soft and smooth on the head. The same material choices can be found in the headband.

The Smart Pause feature detects if you are removing or putting on your headphones. These gestures will trigger the music to pause or play automatically.

When in wireless mode, you do not need to use buttons in order to control the functions of the headphones. The right ear cup lets you control the headphones through touch gestures. You can swipe left or right for next or previous track, swipe up or down to increase or decrease the volume or tap on the ear cup to pause or play track as well as answer or end calls.

You can set just how much noise is cancelled by the headphones, from maximum active noise cancelling, to an ambient mode which allows some sound into the headphones. You can also turn the feature off entirely.

These headphones are quite effective at preventing sound leakage, and also passively block out noise really well. This is achieved by the closed ear cup design along with the effective seal from the leather-surfaced ear pads.

You can twist the ear cups and then fold them into the headband for a smaller, more travel friendly size. In this state, it should take up a lot less space inside your bag for less hassle when used on the go.

Sennheiser offers the CapTune smartphone app which allows users to see the battery level of the headphones, adjust the headphones' EQ, and control other functions.

The case is made from a tough fabric material which should protect the headphones from minor bumps and scratches.

The hallmark of the LCD-4's sound signature is the bass. The lower frequencies go quite deep and also have a lot of power. This sound is achieved without bloat or muddiness. Those who prefer powerful yet still fairly accurate bass will definitely love these.

The mids are full, clear and are quite forward as well so detail from vocals or guitars can easily be appreciated.

The highs take a bit of a back seat. While there is still a good level of detail and resolution on the sound, the highs are not as sparkly or airy as other high end headphones. This can be a good thing for some though as this gives the LCD-4 a smoother sound but with less shimmer up top.

The build is a mix of metal, wood, authentic leather as well as carbon fiber. You can really tell that these headphones are expensive and are built really well.

The open back design gives these headphones good soundstage. Though not the widest, there is a good sense of space and separation to the sound.

The LCD-4's cable is quite thick and hefty which should make it more resistant to breakage and other problems that most thinner cables have. Also, it uses mini XLR connectors which are much more secure as they lock in place.

It uses authentic leather on the earcups' surface which feel really smooth and supple on the skin. There is also a lot of cushioning thanks to the high quality foam material that is inside the cups. The foam also has acoustic properties that help seal in the sound really well.

The LCD 4 comes with case with ample room and padding inside for the headphones and the cable. While the case will most likely not fit in your travel bag, it will provide plenty of protection to your headphones should you decide to take them out of your home.