Thanks for confirming that the 3 pole should work fine. I'm waiting for a response back from LG this week about the module and will most likely end up getting it replaced. I got a 6.35mm to 3.5mm adapter so I could try another set of headphones that I know work perfectly (Denon D7000) with the dac. Completely fine. The connection is still a bit iffy but pleasantly surprised at how well the HiFi module drives them. If it keeps acting up I'll get it replaced, but at least I've confirmed that it can work for me.