Purchased new in September 2018 for jazz live performances. Used about twice for jazz gigs. Afterwards, due to the COVID-19 pandemic, I was unable to perform live and it was stored in a closet. I usually use a combo amp at home, so I would occasionally check the sound. There were no problems when I checked the sound at the end of last year, but when I checked the operation the other day, there was no sound. Also, the fan in the back is not working. I looked inside once, but I couldn't figure out the cause just by looking. I haven't touched the inside, but I couldn't tighten two of the body screws all the way when putting it back together. There are also other scratches. Please understand the above before purchasing. The main unit will be placed in a dedicated case and packed in a cardboard box with the instruction manual, etc.