Box Build For A Single 12in Mmats Juggernaut

[RollinSoLow]

beside having the sub what other factors will i need to have a box build to spec for my sub

i have always paid to get all my equipment installed and im going to attemp to build one

its going to be going into a 73 super beetle with a mmats 1400.1 and mmats 4070 for the mids and tweets