I have the ML Reference system that only only available on the LX/LS and yes I use the CD player sometimes and it is underwhelming. Not sure how many speakers it has but the front center speaker dominates the sound.You must not be referring to the 19 speaker ML system. Otherwise your music quality is lacking from the input side.
Anyone who paid for that system brand new is a total sucker. I have used Amazon music in the past so probably not HD but that wasn't around in 2013 so again I am not believing that Lexus/ML were looking to the "future"
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