Never mind... I think I just realized it. I took another look at the units and realized I was mistaken as to which one had the Channel 3/4 selector switch. I thought Apple included it into the "Switch Box", leaving the "Modulator" to be completely redundant with the composite output that the IIc already has built in. In fact, I was mistaken, the 3/4 switch is on the "Modulator", which means it isn't a composite output but rather a RF output using an RCA connector (as might be expected to plug into the Switch Box). Realizing my mistake on which carried that ability, I now fully understand why Apple included it since it in fact is NOT the same output as already on the IIc. -chris <http://www.mythtech.net>