AKA TRS cables. I have used 8 cable snakes with this passive inline mixer technique (4 tip, 4 ring Yed to 4 stereo plugs). A single TRS cable would be good enough, though. Extremely handy!! I have found the output diagram (any E-Mu gear manual) helpful. Excellent feature of E-Mus. Keep in ming when assigning outputs on the E-Mu, the presence of the plugs in sub1and/or or sub2 will affect your options:
Global -> MIX OUTPUT
Chances are you probably have all the sends going to main, so you might not have to change anything. But if you stop getting sound on some channels, check MIX OUTPUT.
Steve