I am wondering if maybe I have a problem with an updated machine. I have nice crisp sweet tones when using the Sport's external speaker, but the stock lite headphones sound dull and muddy. I tried my Killer B Wasps and also my Jolly Rogers, which the Jolly Rogers sounded most like the external speaker tones, but the volume was cut to maybe 60% vs the stock phones. Switching on the limiter cuts that to about 20% (barely audible). This is with the factory default settings and the master volume turned all the way up to 30. Also, even though the stock phones are much louder than the Killer B's and Jolly Rogers, they still are not as loud as either of these premium phones on other detectors. Has anyone else experienced either or both of these issues? Is it my machine?