Same thing happened to my Xtant. It turned out there was a bad solder in the power terminal. I took it into the local speaker shop and the amp guy there fixed it no problem.

 

which shop did u take it to?

 

When I lived in Waterloo I took it to Point Zero because they're an authorized Xtant dealer. The guy there is pretty good. I went to him and told him my problem, he climbed into my car and screwed around with a couple things. Within a couple minutes he diagnosed the probllem.

I guess for service like that you have to go mom and pop. I don't know that a big box place would do that for you.