The headset/headphone jack is CTIA TRRL [IMAGE]TRRS FRONT JACK CTIA OTMP                     If you want the Red and Green for mic and headphones you need a splitter. Speaker out will Drive Headphones (Speaker and Headphones are usually one and the same) probably 5 volts,  line out would be max around .5 to .7 volts. Some sound cards adjust the voltage based on what is detected plugged into the Green Jack.  Mic in is usually .05 volts.   [IMAGE]speaker digital audio subwoof [IMAGE]AUDIO SYMBOLS AND COLORS   6 surround sound connector Use the (black) surround sound connector to attach multichannel-capable speakers. On computers with a sound card, use the connector on the card. 7 line-in connector Use the (blue) line-in connector to attach a record/playback device such as a cassette player, CD player, or VCR. On computers with a sound card, use the connector on the card. 8 line-out/headphone connector Use the (green) line-out connector to attach headphones and most speakers with integrated amplifiers. On computers with a sound card, use the connector on the card. 9 microphone connector Use the (pink) microphone connector to attach a personal computer microphone for voice or musical input into a sound or telephony program. On computers with a sound card, use the connector on the card. 10 center/subwoofer LFE connector Use the (orange) center/subwoofer connector to attach a center speaker or a single subwoofer. On computers with a sound card, use the connector on the card. NOTE: The LFE (Low Frequency Effects) Audio channel, found in digital surround sound audio schemes, carries only low frequency information of 80 Hz and below. The LFE channel drives a subwoofer to provide extremely low bass extension. Systems not using subwoofers can shunt the LFE information to the main speakers in the surround sound setup. 11 side surround sound connector Use the (gray)  side surround sound connector to attach multichannel-capable speakers. The side-surround output provides enhanced surround audio for computers with 7.1 speakers. On computers with a sound card, use the connector on the card. 12 S/PDIF connector Use the S/PDIF BLACK connector to transmit digital audio without going through an analog audio conversion process. (Digital Audio Output) On computers with a sound card, use the connector on the card. [URL] [IMAGE]NEW TRRS TO TRS   [IMAGE]Different Connections 3 or 4 pins A TRS or Tip Ring Sleeve plug has three conductors and can exist at least as 1/4″ and 3.5mm, and can be used with mono balanced connections (especially when there isn’t sufficient space for the preferred XLR 3-pin), although much it’s used more commonly for stereo unbalanced, at microphone level, line level or speaker level.. A TRRS or Tip Ring Ring Sleeve plug has four conductors and is very popular with 3.5mm, and can be used with stereo unbalanced audio with video… or with stereo unbalanced audio plus a mono microphone conductor. The TRRS connector is extremely popular with smartphones and tablets, and to some degree with computers, including Chromebooks and Macs. Unfortunately, there are two conflicting standards associated with its use with stereo unbalanced audio plus a mono microphone conductor.. The older OMTP wiring standard calls for Tip to be used for left audio, Ring 1 to be used for right audio, ring 2 to be used for microphone, and the sleeve to be used for ground. According to my research, this older OMTP standard is found in old Nokia (and also Lumia starting from the 2nd generation), old Samsung (2012 Chromebooks), old Sony Ericsson (2010 and 2011 Xperias), Sony (PlayStation Vita) and the OnePlus One I used to own before migrating to a Nexus 6 for use with Project Fi. The newer CTIA/AHJ wiring standard reverses the last two mentioned, so it calls for Tip to be used for left audio, Ring 1 to be used for right audio, ring 2 to be used for ground, and the sleeve to be used for microphone. According to my research, this newer CTIA/AHJ wiring standard is used in products from Apple, HTC, latest Nokia, latest Samsung, Jolla, Sony (Dualshock 4), Microsoft (including Surface, Lumia, and XboxOne controller with chat adapter) and most Android phones. NEW headsets follow the TRRS like the old Iphone 6 headset etc. To convert OLD headset to the new TRRS is the reverse. [URL] [IMAGE]OLD TRS to NEW TRRS  
I love my new XPS 8940. But the audio ports are unfamiliar to me.  On the back, I know green is Audio Out, but I don't recognize black or orange. I think it really is orange, not pink for mic. I don't know what those icons are representing.  On the front there is a headphone port, which I guess will work as a mic port? It is also black, though.  See photos.  [IMAGE] [IMAGE] 
XPS 8940, what are the audio ports?