The 3.5mm headphone jack is a decades-old standard on all sorts of audio-transmitting gadgets, so lots of our devices—including our cars—are made to accommodate them. But now Apple is getting ...

The advent of wireless headphones is slowly laying the headphone jack to rest, but it’s not going out without a fight. The design, which traces its roots back to the late 1800 s is sure to find a home ...

Ask me how I know. However, others are more complex. Certain luxury cars in the late 1990s use a digital audio input over optic fibre that is difficult to spoof with off-the-shelf hardware.

In fact, I don’t see any audio input jack at all, much less a Toslink connection. How am I supposed to do this now? You’re correct that the Mac Pro has no audio input.

You simply run an optical cable from the audio-output jack on the Apple TV or AirPort Express to an optical input on your audio system. The Apple TV requires a standard TosLink connector; the ...

Also on the back of the right speaker is the power port, and an audio input jack you connect to your PC’s headphone port using a supplied 3.5mm cord.

There’s a 3.5-mm audio input jack and a USB port for connecting a camera, MP3 player, or flash drive on the unit’s right side.

The successfully-crowdfunded BTunes plugs into the audio input jack on the headphone cup and gives Bluetooth superpowers to previously wired-only cans.

To the left is a 1/4-inch jack for connecting headphones; doing so mutes output to the speaker outputs. To the right is a 3.5mm stereo-input jack for connecting an audio source.

I have a desktop computer with a couple of audio input jacks (a mic jack and a line-in jack; nothing special). I also have a laptop and an iPhone, both of which have an audio out (headphone) jack.

Unfortunately, "MP3 compatibility" is just a flimsy 2.5 audio input jack and a speaker system that doesn't even have an amp-much less decent sound quality.