Can I fix my 3.5 mm jack? [pic]

Got a nexus 6 64 gb 3 weeks ago. The 3.5 mm headphone jack is not functioning properly. The problem consists of the audio being

1) very low volume and

2) distorted in a specific way; the bass and parts of the midrange seem to be missing.

The result when listening to news etc on radio is that some people's voices sound fine and others very low or distorted. Music sounds completely distorted.

This is an intermittent problem. I've tried using my regular headphones which work fine with other devices. They have a TRRS plug and a switch to swap between android and iPhone compatiblity although this setting does nothing in this case, sounds the same. When I plugged these in yesterday just to see if the problem was still there the sound was completely fine, problem gone. Later that day I tried again and the problem was there.

I've tried plugging in a pair of other TRRS-plug headphones which work in other devices with the same result.

Now, I tried plugging in another pair of headphones which have a TRS-plug and these always work. So if I plug in my TRRS-plug headphones, problem is there, switch to my TRS-plug headphones, problem is gone.

I can't figure out any other explanation than that the 3.5mm jack on my nexus 6 is broken.

Here's a pick of my plugs: http://imgur.com/FuqavHv