I am using headphones at work that I also use at home. The difference is that my computer at home is an MBP 2015. The headphones work fine there. They are basic 4 pin phone earbuds, with volume and play/pause.
But even at max input volume the audio is barely audible unless the output volume is at max. I tapped a pen against the mic pickup and it's only audible at >50% volume (which is actually loud for listening to music or video, I usually keep my volume at 20%).
Work computer is a 2016 MBP, the one with the touchbar. Home computer is 2015 MBP, no touchbar.
These headphones pick up audio fine when plugged into a 2015 MBP and an Android phone. It's safe to say the headphones are not the issue.
What is the difference here and how do I fix it?