Could not find a way to update or edit my original review so adding to it this way. Since last review I have upgraded amplifiers to the deaf bonce aak 4000.1D (purchased here) and upgraded my alternator to the mechman 320a alt (also purchased here) and have upgraded my wire from 4 awg ofc to 0 awg ofc with 4/0 welding cable being my primary run to the back. This subwoofer handles this amplifier amazingly well. I am not sure what I'm getting out of the amplifier but I've done all I can to get the most out of it and tuned using an oscilloscope. Still this 4,000 watt amplifier is not enough for this subwoofer. Most definitely it is hitting VERY hard but no where near being maxed out. Now I'm curious to see how much clean power this subwoofer can handle. Attatching pictures of how it is set up now. Again THANKS BIG JEFF!!