Hi everyone, I just got a SVR-3 Pro I ordered off ebay. I plugged it into my 410HLF to test it. When I turned it on, it started making this weird whining noise (coming from the amp itself, not the speaker cabinet). I originally thought there was a police siren outside my house, because that’s what it sounded like. I turned it off to see if it would stop. The sound rose in pitch as it turned off before cutting out completely. I can still play bass through the amp when it is on. Is this a normal issue? Should I return it? I’ve attached a video with the sound. It starts at around 0:10. thanks.