Sennheiser HD380 Pro vs Bose QuietComfort 25

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.

The traveling case is small and provides room for spare batteries and other components. This makes it pretty portable, for those that can't or don't want to leave their headphones at work.

These headphones use a triple-A battery to power noise canceling. Should it run out of charge, it can easily be replaced.

With the feature switched on, you can really zone in on the music. Noise canceling is very effective at blocking out ambient noise, especially the lower frequencies. On a flight for example, engine noise is drastically reduced, as well as most of the sound from the conversations in your vicinity.

The QC25 feels comfortable even after wearing it for several hours. The pads go over the ear and feel soft, as the ample cushioning is covered with supple and high quality synthetic leather. Aside from the usual headband padding, it also has an inner Alcantara lining that feels really nice on the skin.

You have a number of options as to how you want to use these headphones' active noise canceling feature. You can either have the feature on or off while you are listening to music, or have noise canceling on without audio. This is a nifty feature if you just want to enjoy some peace and quiet when in a noisy place.

These headphones will not tire your head or neck out, even if you wear them for quite some time. These are pretty light at around 196 grams.

Sub-bass is a bit laid back, but the overall low-end production is punchy and with good extension. Mids are clear and forward so vocals, guitars and keys sound good with these. The upper treble is boosted, which results in good detail, but can also give harshness to the sound.
Overall, this is a really fun set of cans to listen to, especially if you just want to have a fun music listening experience.