I could, but it's a faff on when trying to sit down so the service can carry on.
So, I think I have a solution, I changed my cable for an OBBM one I forgot I had and got an immediate cut in the gain buzz. So I tried a few different kettle leads and bingo! down to an acceptable level.
Just to add that when I unplugged my bass cable the noise stopped dead, I've never known a cable make such a huge difference.
I'm fairly new to all this as I played a 12 string guitar since the mid 60's, that was much easier to amp up