Aurender N10 - Sound quality performance is erratic


I am having problems with my N10. Some days it plays amazingly good, other days good and some days not good at all.

I live very near Aurender in SoCal and so I took my unit in for service and they provided me with a loaner. The first session after I put the loaner in the system was all-time good. Then the next day wasn't all that great. Then the next two days were good but no great. Anyway, this is just weird. Both N10s appear to exhibit this erratic behavior.

My internet is ATT DSL at 24Mbps and that has been suggested as the culprit (I was thinking about calling and asking them to give me a trial at 50 or 100 Mbps to see if the increased speed will eliminate the problem - 24Mbps is fast enough I almost never seen buffering in Netflix). It has been suggested that I get hi-speed cable to solve this problem and get rid of the twisted pairs on the phone line. I have tried a DSL filter and it hasn't seemed to help, assuming I've got it installed correctly.

So have any of you N10 users had this problem? If so, how did you fix it?
pokey77
FYI - I just want to say that Aurender has provided exceptional customer service so far. We all acknowledge this is an unusual problem and will continue to work towards solving it. I do appreciate your help here on Audiogon very much as well.
Last night I played a few tracks I am intimate with and then tried the long press of the "Play button" choosing the Restart option, and unfortunately for me, this did not change the sound quality at all.

@pokey77 

An additional step I take to clear the cache memory is to clear the last played playlist with the Clear button before I start playing a new playlist or album.

Yes. Aurender service is indeed top-notch. :)
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JA's comments apply only to the A10 which has its own dac section.
Correct, my bad, just saw Aurender and 10 and flashed back to this hobbling Aurender did on this unit..

Cheers George