Overpowering the sub just to see how far it goes....at the end of video, coils were warm and I could smell it....Blaupunkt 18" vpw 460 running of RF t20001bd in a custom boot enclosure made by galen to fit in febs white nissan cefiro a32...sub is connected to 1 ohm and is getting atleast 2kw+ if not more...The custom box is far from complete, There is a top cover to go on so none of the box will be seen, it will also give a big flat boot area.