Re: My subs start fading when both are connected. Help?!
What you should do, is grab a battery (small AA battery will work) and touch the positive wires to the positive end and the negative wires to the negative end. They should both push out and hold that position til you disconnect it. If they are out of phase, one will go out and the other will go in. Simple to check and it will guarantee your phase.
Refs: Dipitydoo, appollyon, bad95gt, revrider1, jwh1598, ampjunkielikeme, deathpenalty18, ssackett, snoopysnooper, corey0928, SPLAudio, Clifff150, CL1CKCLACK, ShawnT, West + more