Hello good people,
Maybe a long shot, but: Does anyone own a big box Holy Grail? I have one and like the verb, but it has a whining noise. I pull it out now and then, connect it and turn it off again. I have used it's own supply and voodoolabs, but always the same whining. Doesn't play nice with other pedals, they make it worse.
Does anyone here have the same experience by any chance and know what causes it/how to fix it? I can sell it, but feel bad selling someone else this whiney thing.