CDog25

I am having the same issue. I have ordered three sets of headphones and all of them pair to the Nox but I get a crackling sound when swinging the machine. I have an old pair of non-aptx-ll headphones that worked fine but they quit taking a charge. A co-worker let me borrow his Lg Tone Pros and they seen to work pretty good but from time to time I still get the scratchy audio. 

I emailed Minelab and they just told me to try and find somebody that has the factory headphones to test mine with. The problem is that I don't know anyone that has those headphones so I have know easy to check it.

I have been checking in on this thread for the last month. I greatly appreciate all of the information this site has on the Equinox. In that time I have order 4 different pairs of bluetooth headphones to go with my 600.  I have ordered the Soundpeats Engine, the Soundpeats Q12+, the Dudios Zeus, and the Aukey Latitude. I think Amazon is going to drop my account with all of my returns.  Every pair have had the same issues.  They connect, but I get a crackly sound and they cut in and out.  I had an old pair of Taotronic TT-BH23 (now discontinued) that I have been using and got good sound out of them even though they were not low latency but this last week they decided to quit taking a charge.

I contacted Minelab and they suggested I do a factory reset, which I did and have done each time I switched headphones, or possibly meeting up with someone that has the factory bluetooth headphones, which is not possible because I don't know anyone that has them. 

Has anybody had any issues similar to this?  Any help would be appreciated.