I have one of these systems. There is a 6 pin mini-din on the back of it labled control I. Anyone know the specs of it? Control A1 compatible at all? There is a different PC link interface for it then the usual one that they supply for the JA20ES and 920. I sould like to be able to control it without sticking an emmitter on it (It looks styley - an emmitter would ruin its looks)