Car Audio Subwoofers

just messing with it and need to find a better came that don't distort with the bass and remember its a budget build better stuff will be ordered as i go along right now i have only spent .29 on the wood and subs the amp was free from my cousin witch was moving and didnt need it and for what has been put in to it it hits harder then i thought it was going to so if i can find a TermLab to use i would love to see what numbers it will do before i upgrade anything so enjoy