yes,that was a dumb question,I asked it before I left work and thought,wow,that was a dumb question.About a month ago he was given 2 Earthquake 15s....well,yesterday as my friend was cleaning out the garage he found 2 more 15s.They are Annihiator 15".Not sure,but I think these take a HUGE box.The pair he brought out yesterday were in a box somewhere around 4' for both.I used the Autosound 2000 disc and they couldnt play any not below 100hz for crap.But,I still have no idea of where to start for a box and cannot find anything online about the subs.