So i have had the unit for about a year and a half and i have used it to check about 5 systems and haven't touched it recently.
When i go to use it to test a head unit as soon as the volume gets loud enough to hear (very quiet still) the dd1 detects distortion. i have done this with more than one HU and an amp.
Is there something im doing wrong? i make sure the right track is playing, im not sure what is going on