I'm currently just going to add a sub and amp to my stock system, so I technically only need a 2-ch LOC, so I was looking at the NE-7V for $20
http://www.davidnavone.com/adaptor_products.htm
Then I saw that the 4 ch NE-774V is only $10 more, so I'm contemplating just spending a little bit more for that in case I decide to add another amp for the speakers later or if I take it out of the car I may have a better possibility of future use with the 4 ch. So my real question is: With the NE-774V can I splice into two channels of my stock and leave the other two wires disconnected (and obviously the 2nd pair of RCA's disconnected) or do I have to splice into all 4 of of the wires even if I'm just going to be using 1 set of the RCA outs?
