check the ohm load with a dmm, qs should be able to get loud without a problem, have a feeling its at 4 ohms and not 1.I didn't do the wiring of the sub. I had David [TeamPSI] do it, and he just left me with a single wire, so I'm sure he did it right.
What's the easiest way to check it to make sure? Or do I need to take the sub out?