I got a 30$ subwoofer just for fun just to do experiments with. It lacks spec's the only information i found about it is it has a 2 inch coil 80 watts rms per coil and its dual 8 ohm and that's it for the spec's. I put on a (estimated) 65L enclosure with a 4 inch diameter port and its about 36cm in length, but when i started playing bass though it, it sounds pretty decent it hits the 20's and 30's decently, but i started to smell burning coil i looked at it as low notes play and it barely moves at all therefore the pole vent barely sucks any air to cool the coil down. This subwoofer does do a good amount of excursion free air it's definitely something to do with the box. what are my options to fix this issue?