I can't help much with your current situation (sorry) but I was a SWR Basic Black owner several years ago. I really loved the combo but the amp developed problems - the volume would go from moderate to ear shattering all on its own. I couldn't fix it and I sadly had to get rid of it.
A good friend also had one, on my recommendation

, and used it as his primary gigging amp. He wound up punting on his when it would completely cut out on stage. He had it in the shop several times and even had the main circuit board replaced, all to no avail.
I know that a lot of people have had nothing but great experience with the Basic Black, but I've always wondered if there was a period where there was an inherent design flaw in the units that caused the problems I and my friend had, as they were both purchased new around the same time.