I thought I knew what was going on here, but a co-worker now has me confused (I think intentionally).
I'm setting up a dual 4 ohm voice coil sub wired in parallel for 2 ohm operation. The sub is rated at 900w RMS @ 2 ohms (450w per coil). Do I need an amp rated for 900w or 450w @ 2 ohm? I...