I received my Blackhawk on April 1st and I’m still trying to get rid of the hum/hiss the amp is producing. I have isolated the power supply, cleaned up all cable runs, tried multiple speaker cables and speakers. I’m running corner horns with fresh crossovers and tweeters. I’ve also hooked up other SS amps and they are dead quite between songs at all volumes. Do you guys have any suggestions that might help? this amp sounds great while music is playing at mid volume but the hum between songs is maddening. This is my first tube amp and maybe some hum is normal but at 15’ it’s just to much for me. Any suggestions would be appreciated Thanks.