This is called an auxiliary port, and it allows users to plug in their smartphones or MP3 players using an audio cable, that way can play their music through their car stereo without the need for CDs.

I want to send the audio from that jack to the mixer. We have a special A/V direct box that we sometimes use for a VCR or DVD player, so it has a female mono RCA jack and a female mono 1/4" jack.

Right now I have: Male RCA to Female Aux -> audio source Male RCA to Piggy Back Cable -> speaker amp/speakers Female Coupler to Male RCA cable -> Subwoofer This has run fine for years.

Simply pick up a 3.5mm mini jack male-to-male audio patch cable (although for some Mitsubishi vehicles, you may need a 3.5mm mini jack-to-RCA patch cable), plug one end into your Android's ...

Mini-Stereo-to-RCA Audio Cable The most common solution used to stream iTunes to an audio receiver is to connect the "Audio Out" or "Headphone" jack from the computer's sound card to the receiver.

QED Performance J2P Graphite 3.5mm to RCA Interconnect ($69.85/1M) If you use a Dongle DAC or network streamer with a 3.5mm output, you need a cable like the QED Profile J2P. The QED Performance J2P ...

They're also pretty expensive: $15 for either the 1/8" to RCA or 1/8" to optical adapter, neither of which is very long (though they don't need to be).

You can then feed that RCA socket with any suitable audio cable. For example, if you're recording audio from a radio or an iPod, you'll need a 3.5mm to stereo RCA cable.