The number of drivers in each headphone. However, quantity does not equal quality. Driver coordination, their configuration, correct crossover, sound bores affects the sound
Most of the headphones are dynamic but there are electrostatic, isodynamic, etc.
No higher than 32 Ohms for smartphone headphones. When using a good player or amplifier, it can be up to 100 Ohms. For stationary models you should coordinate the impedance with the amplifier power
More sensitive headphones will play louder than headphones with less sensitivity (with the same signal level and resistance)
Model: Aurian Hurricane
Brand: Aurian
Cable length, m: 1.2
Model: Aurian Ocean
Model: Aurian Storm 2
Model: Aurian Forest
Model: Aurian Sunset 2
Model: Aurian Acid
Model: Aurian Skyline
Model: Aurian Canyon
Model: Aurian Jungle