Nooo. Don't take my headphone port from my MBP! In my home office, I have it wired to my simple mixer and amp with which two other computers also connect to. A

Nooo. Don't take my headphone port from my MBP! In my home office, I have it wired to my simple mixer and amp with which two other computers also connect to. And from that split into my speakers and a pair of headset. All non-digital and no USB involved with other things that can go wrong. I am no Hi-Fi buff, I just like one volume and power button when I need to silence or amp things. Whilst commuting on the train I also use the headphone jack, even though I also have a Bluetooth headset, but it is limited to two sources which are already used up by my iPad and phone. I don't want to yet again swear internally whilst standing on a busy tube with 1000 other people with Bluetooth devices, and having to reset the pairing on my iPad/iPhone. Ps. I have an old phone with a 3.5mm jack, but I never use it. I use audio on my phone only when commuting or walking and then use Bluetooth. But my old iPad and MBP are stationary so I only use 3.5mm devices with them.