The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.
Audeze LCD2 Classic: 106mm
16. has an over-the-ear form
Comfortable full-size form with earcups that fully enclose your ears. This model is loved for its increased sound isolation and the fact that it won't leak sound to your neighbors. It offers potential for maximum bass and loudness levels.
40% have it
17. has included ear pads
Allows you to change ear pads without buying new ones.
42% have it
18. travel bag is included
The device comes with its own special case or pouch, which is useful for safe transportation.
63% have it
19. has a straight plug
A straight plug is better when the jack is on the top or bottom of your player.
50% have it
20. has an L-shaped plug
An L-shaped plug is better if the jack is on the left or right side of the device, so that the cable isn't bent, and is less likely to break when the device is in your pocket.
31% have it
21. has active noise canceling/noise reduction
This type of device allows you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise. Ideal for plane rides and morning commutes.
13% have it
22. has a 3.5mm male connector
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
83% have it
23. sweat resistant
Resistance to sweat makes it ideal for use while doing sports.
11% have it
24. cable length
A long cable ensures more freedom of movement.
Pioneer SE-A1000: 6m
25. has a noise canceling microphone
These microphones are designed to filter out background noise from the desired sound. Especially useful in noisy environments.