On the audio side the keyboard is equipped with dual Cirrus Logic CS43131 DACs and supports up to 32-bit / 384kHz and DSD256 audio. Alongside the standard 3.5mm headphone jack, there’s also a 4 ...

Despite these shortcomings, the Dual DAC is the only DAC on our list ... After a few weeks of use, the metal collar on the headphone jack came loose, and I had to start twisting the headphone ...

This airline adapter converts a dual-prong airline jack to a standard headphone stereo plug (3.5 mm, 1/8 inch). Plug the headphones cord into the adapter and insert it into the airline jacks to ...

Why Have Most Phones Removed the Headphone Jack? It has become difficult to find a flagship phone in the US with a headphone jack. The old 3.5mm plugs seem to be déclassé to high-end vendors ...

So, in essence, the double headphone jack was just one step in this evolution. Nonetheless, why did airlines stick with them for so long? And why do some older planes still have them today?