Reminds me of my good friend Pete from HS. His immaculately restored burgundy 68 VW Microbus had 3 JL Audio 18" (!:shocked:!) powered with a total of 2.5Kw worth of Alpine amps. That thing was nuts. They were mounted in a triple bandpass box with ports about 4 inches in diameter. With the motor off, they would flatten the Optima battery in about ten minutes.