Information Needed on MLX-100 and RCA outputs

[Lucky 76 5]

I was thinking about buying an mlx-100. I wanted to use it to take the subwoofer output on my 3sixty.2 and branch that signal into 4 outputs to power 4 of my saz1500s. (I know I could do this with y adapters as well).

My question reguards sending the 4 output signals unbridged to the amps. In the video posted below they show you need to connect a and b, c and d but then stop. These are all positive polarity. Would I only be able to send identical outputs to 2 amplifiers this way? What is the deal with this? Please enlighten me.

Also would it be a better idea just to get y adapters? I really don't know anything about the mlx-100 except for the fact that you could control multiple amplifiers at once.

Thank you!

Chris

Here is the link