i put Jolly Roger headphones on my excal today ...spliced them 3" down from ear piece and put water proof connection on both stock headphones and the jolly rogers.problem is there is very little volume coming from the jolly roger's..no matter how i wire them ? they do work but at about 1/2 the normal volume? excal has 2 wires and JR's have 3? the volume knob does work but only puts out about 1/2 normal volume? the mono switch works .any ideas?