Sennheiser HD380 Pro vs Bose QuietComfort 20

The tight clamp on the 380HD helps create a seal that prevents quite a bit of sound leakage.

These headphones, as far as reference or pro-quality headphones go, are fun sounding. There is a slight boost to the lower frequencies which adds fullness and depth to the bass. The mids are also full-sounding, but there is a peak at the upper mid frequencies which can make guitars in heavy music sound harsh. The highs have good detail to them, but the peak in the top frequencies can also make the sound a bit grainy.

The 380s sit well over your ears and do not typically touch them when positioned correctly. This helps make them comfortable as the clamping force is distributed over a wide area, not directly on your ears.

The HD380 Pro is quite portable thanks to the detachable cable. Also, the included cable has a specially designed locking mechanism which prevents it from being detached accidentally.

The HD380 Pro can produce great sound even paired with low power amps. Some headphones require expensive amps to sound properly, but for these, even entry-level portable amps are sufficient.

These headphones can easily be brought along while traveling and spending time outdoors thanks to the included carrying case. The solid, clam shell design gives the headphones extra protection from impact and scratches.

The large ear cups and the strong clamp allow for impressive passive noise cancellation.

These headphones have fairly wide soundstage, despite being closed back.

The ear cups of the HD380 Pro can be folded up into the headband. This reduces these headphones' size and footprint, making these much easier to fit inside a bag.

These headphones are ideal for long flights. In addition to having overall impressive noise-cancelling (-33dB across all frequencies on some tests), these headphones excel when you need to cancel out low frequencies like jet engine sounds (-45dB).

The headphones stay comfortably in your ear. They don't always offer a complete seal but surprisingly, this doesn't affect noise cancellation or reduce comfort. Also included are 3 sizes of eartips to help better fit your ear. Note that these tips have a unique design so you won't be able to use aftermarket tips.

These headphones have a 2.5 ft cord that's split chest high with a control module near the jack. It does a good job of not getting too tangled.

The pouch will make it much easier to bring the headphones and its accessories on the go.

You can disable active noise canceling at a press of a button. Aware Mode can be quickly accessed from the remote, which will disable active noise-cancelling and open up the microphones to allow you to hear your surroundings better.

LEDs on the control module will let you know when this mode is turned on.

These QC20 has a lithium-ion battery that promises to work for 500 charge cycles without diminished returns. After that it will still work, but won't last as long.

Note that the battery is non-replaceable so when it finally does stop working, you will need to buy a new pair of headphones.

These headphones come in 2 flavors:

• QC20 that includes a 1-button remote intended for Android users
• QC20i that includes a 3-button remote intended for iOS users