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Topping A90 failure issues. Should I try a 3rd A90?

I purchased the Topping A90 & D90 MQA August 2020. The A90 lasted about 3 months then "blew up" with major static in one channel. I tried different headphones, connects (4 pin XLR, 4.4mm pentacon) and it was in fact the A 90. Apos exchanged the failed A90 (took a long time) and after using the 2nd A90 for less than a month, the same issue. So after 2 failed A90's I'm wondering if I try a 3rd or another headphone amp? I'm using XLR balanced (and have 2 headphones that are also balanced cables). Thanks for any counsel. 
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Showing 1 response by audioville

audioville
1 posts
 
I know this chain is a bit old, but I think the same thing just started happening with my A90. Static in the right channel from all headphone outs (both balanced outs and single ended out). It seems to be certain frequencies or volume levels that are effected (e.g., I'll head the same "static" noise on each drum hit).

Tried different headphones, different cables, different outputs from the computer (USB and optical to the D90, then XLR to the A90). The RCA outs on the A90 to my speakers do not have the same issue.
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