Installing Extra Voltage Regulator Car Amp/batteries For System?

Car amp/batteries for system? - installing extra voltage regulator

ok, I'm preparing two 18 "and two submarines 1800watt DVC 500W Gear Drive 6x9 8-way speaker install on my 1989 Lincoln Towncar, I think Seb's installation on the trunk and stakeholders in the controller or the door Passengers will propose a better place? "My real question is what kind of amplifier should I, how many watts you should both get and how many channels amps .... And I was an extra battery or two or five, or something be good if the battery is a certain tension, the links are very helpful, I have to thank you.