cost is around 3000rs. in total..i had to go and buy parts from pindi ...in different locations...base is of a jbl...its 15"... round 1500watts ...95db sensitivity so it plays really low frequencies as well...the really problm was finding a gud heavy duty cone ..the plastic ones available here are not strong enough and dont give dat sound..overall it took 1 day to buld and 15days to find appropriate parts...i have one just ready to be built but cant find the ryt parts yet...