If over ear headphones seem too bulky, let’s take a look at a less cumbersome on ear Sony MDR ZX110. They have relatively small ear cups with closed back and are connected with a built-in wire.
Sony MDR ZX110 specs show a low impedance of 24 Ohm and a decent range of frequency response of 12Hz-22KHz. The sensitivity is 98 dB.
The sound quality is moderate. They lack a bit of clarity for instruments and vocals. However any range is not drowned. They sound neutral with a right amount of bass, mids, and highs. I like that they do not sound sharp, but rather warm. The soundstage is not spacious to feel the music like live but they still sound decent for casual listening.
The audio cable is the only option of connection to other devices as it is built in. Its length of 120 cm/3.9 ft is optimal for comfortable use without tangling.
These headphones are incredibly light with 120 g/4.2 oz and very portable being folded in a smaller size with the swiveling cups. The headband is adjusted to fit various head sizes but it seems to me to lack padding. Still it does not feel tight. The cups are softly padded. Unlike over ear, the on-ear design does not make ears so hot and sweaty. But they are unstable on the head for active use like sports.