Modified Logitech X-540 5.1 pc speakers. Custom box and sub

Scrapped together a box cheaply and put the x540 amp in with a 5 inch tang band subwoofer. The sub hits much much lower but the box is larger than the stock one but not by much. If you have good headphones or a good sub you will hear how deep this little 5 hits. It is .43 cubic feet tuned to 45hz. I ran this in a .6cu ft and it hits even deeper around 35hz -3db.