My DRRI has a strange reverb problem. The reverb only works if the reverb tank is outside of the cabinet. Inside the cabinet I have no reverb and as the reverb is increased noise increases. At the moment I have the tank sitting on the floor beside my amp and it's working perfectly. I've cleaned the connections, checked the cables, made sure the bag wasn't screwed down to tight. Also checked to make sure the cardboard on the bottom wasn't touching the springs in any way. Any help would be greatly appreciated. I'll be needing the amp for a gig soon. I'm also thinking about building a box and moving the tank outside for good. Any advice?