Hello, Can anyone help me with a small problem ? I recently bought a Quad 306 amp that planned to use with my DC-1 preamp. When I connect the "Front" output of the DC-1 to the input of the 306 the speakers screams at full power, even with the preamp turned off or unplugged. I works with the rec/zone2 output of the preamp but I get no audio control that way. I also have a much older Quad 303 amp, no problem with that one. Any ideas would be very appreciated.