K240

K240 is a model designation used across different industries, but it is most widely associated with the AKG K240 line of headphones. The AKG K240 family is a semi-open, dynamic studio headphone line produced by AKG Acoustics, now part of Harman. Introduced in the 1970s, the K240 range has remained popular for recording and mixing due to its balanced midrange, comfortable fit, and relatively wide soundstage. The design features over-ear cups with velour padding, an adjustable headband, and replaceable cables. The usual plug arrangement includes a 3.5 mm connector with a 6.3 mm adapter.

Variants in the K240 line include the K240 Studio, K240 Monitor, and K240 Mark II. These models differ primarily in impedance and connector/cable configuration, with some aimed at professional studio use and others at more casual listening. Impedance can vary across versions, and all versions share a similar driver size and the semi-open design that characterizes the line, contributing to a sense of space in the audio signal while offering relatively low distortion for monitoring tasks.

Impact and reception have solidified the K240 as one of the enduring reference headphones in audio engineering. It is valued for its detailed mids, stable sound signature, durability, and a price point that remains approachable compared with newer high-end models. While newer headphones have entered the market, the K240 line continues to be used in studios, classrooms, and by enthusiasts seeking a reliable, affordable monitoring option.

In other domains, K240 can refer to product codes and model numbers not related to AKG, and the meaning depends on context.