Sound by Singer. Carried Audio Valve, but when my amps needed repair, it took 3 phone calls just to get someone to answer my question about repair. Let's just say they were not interested in assisting me in any way. I had to find repair work on my own. I was willing to pay whatever price it took to fix these, so price was not an issue.
They just refused to stand behind the product and were unbelievably arrogant as a bonus.
I don't want to get started on Tim Paravincini, but I needed
a replacement part and his personal behavior (not the amp) caused me to fix it and dump it because I didn't ever want anything in my system that reminded me of his incredible
behavior over a simple broken part for one of his amps.