just a quick question, I have a JVC KD-G310 HU that only has one set of preouts for the rear and I want to amp the fronts, what are the benefits of running the front speaker level outs on HU through a signal convertor and using rca's vs. using the pass thru feature on my amp and going to the other amp. will there be a large enogh difference to justify the cost and what should i look for in a convertor if that's by far the best.