I had a single channel die on my first ADA1500. Sent it back earlier this year. It died in a way they had never seen before.
Got a new one. Received it later this year.
Another thread on this issue but in brief, it had a hum that the other one never did.
Recently somewhat resolved that (in just the past month).
Was a full year of going back and forth.
I've seen some other posts, people not trusting the Axiom amps.

"Those who preach the myths of audio are ignorant of truth."