Based on my current experience with the Amber 3 at some 80 hours of burn in, I would say your Amber test unit is not burned in fully. Your comments about brighter and lack of depth point to this fact. If the unit only has 100-120 hours, then it needs more time. Mine is still changing and breaking in at 80 hours and other owners tell me it will take 200-300 hours. I believe it based on how this unit is changing day to day. Can you try to compare to the AM unit after the Amber has some 250 hours? I would like to hear your comments at this point. Possible?
My Amber 3 started off bright, forward and forced for the first 30-40 hours. From 40-65 hours it became more full bodied to the point of being old school thick and heavy. Now at 80 plus hours the unit is leaning on the lit up side in the highs and the mid bass is now remaining full. I am told it will go south in sound quality before finally coming into its own at 200-300 hours. What a ride.
My Amber 3 started off bright, forward and forced for the first 30-40 hours. From 40-65 hours it became more full bodied to the point of being old school thick and heavy. Now at 80 plus hours the unit is leaning on the lit up side in the highs and the mid bass is now remaining full. I am told it will go south in sound quality before finally coming into its own at 200-300 hours. What a ride.