Let’s view a model of Japanese audio brand Audio-Technica ATH-M20x that represents over ear closed back headphones with a wired connection type.
I will start to review Audio-Technica ATH-M20x specs with its impedance that is 47 Ohm. They are quite loud and usable with low impedance devices. The frequency response range is 15Hz-20KHz that provides a decent quality sound at all pitches. The 96 dB sensitivity is great for loud volumes.
The headphones Audio-Technica delivers a very nice, pleasant and rich sound. The balance of low, middle, and high ranges is harmonious. Every detail is clear and distinct without fatiguing and excessive brightness. Unlike many other headphones they do not put mids backwards on the stage but deliver just the right amount of it. That makes a great critical listening device and a nice choice for neutral listeners of most genres.
The connection is represented with a 3 m/9.8 ft wire. It is detachable. That is safe if you move and it tangles over something or if you wish to change its type/length.
The headphones are incredibly lightweight with 190 g/6.7 oz. They fit great with an adjustable headband which is also well padded. The large cups are amply padded as well and I find them comfortable to wear for hours. They do fold to carry and store in a smaller size. The design is made in all black and looks a bit plain and plasticky.