So I had quite the wild ride with this A90D...
12 hours into ownership I'm jamming away and I go hmm...don't remember this track being so right-sided. Volume also dropped out hard. 99% on the volume and not even remotely loud. Barely a normal listening level. Yup! A90D took a dump. No "pop" no abnormal pitched noise. Just left channel died on my Arya and volume dropped out mid track. It broke the left driver in my Arya on the single-ended unbalanced output. Zero audio output on my Arya. Tried swapping cables around, different amp, etc. Dead. What kind of recourse you think I have with Topping? You think they'll tell me to shove it or you think they'll try to compensate me for destroying my Arya in less than 12 hours of ownership? I'm out of warranty and had to pay Hifiman for a replacement (with shipping in my busted Arya).
Vendor definitely went "above and beyond" to try and right the ship the best they could. They offered replace vs return. I figured replace. I have the new A90D with the broken one still on my desk (it's going back tomorrow). Very trustworthy vendor to send a second one out without receiving broken product and without additional funds placed on hold. They also gave me a killer price on a new pair of headphones so I picked up the Focal Clear Mg. Breaking them in and using the XLR pathway on these. So here is A90D #2 with a pair of Focal Clear Mg while my Arya on a UPS truck back to Hifiman.