Hi, I recently decided to upgrade my Type-R subs to 2 Sundown SA-12's (4 Ohm) for my SAZ-1500D amp and want to set them up as 1 Ohm and I have followed the diagram on the12-volt which is this: but my sub box has 2 wire terminals for each sub so what I did was for each sub - to - and + to + with the one + wire from the top coil and the - from bottom coil to the terminal and from the terminals to the amp to their -/+ and set jumpers on the amp as + to + and - to -, this should be ok right? I had the Type-R's is the same fashion which worked fine but the SA-12's aren't pushing which is making me think I might have done something wrong in the wiring so if someone can please help, I am thankful.