I think Jond's response is a bit harsh here. I would not say that "CD-7" is very original whether company A is first to use it or not. I am surprised that ARC did not name this product the CD7 to be more inline with it's CD#, LS#, PH#, D#, V#, VT#, etc., model designations. Other than the MK II or III and Reference designations, the product line has always been straight forward.