The number of drivers in each headphone. However, quantity does not equal quality. Driver coordination, their configuration, correct crossover, sound bores affects the sound
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)
Most of the headphones are dynamic but there are electrostatic, isodynamic, etc.
Model: Aurian Hurricane
Brand: Aurian
Cable length, m: 1.2
Model: Aurian Sunset 2
Model: Aurian Ocean
Model: Aurian Acid
Model: Aurian Storm 2
Model: Aurian Forest
Model: Aurian Skyline
Model: Aurian Canyon
Model: Aurian Jungle