I've only gotten out with the Manticore for a bit over 2 hours in the wild and only a few minutes in the test garden so I have insufficient time to report on my new detector's performance.  But in the still questionable weather I have been able to do some indoor testing and headphones are one of my targets.  I go through the options, starting with the most important(?): 1) ML105 wireless headphones (included).  I was able to use these in the field.  Much better than the Equinox 800's stock