poptopclk

I want to install after market amp near rear passenger area and have speakers by the little rear

storage boxes. Where is good source for 12v that can manage 40 Amp? also need a place for 12v turn on circuit that is only powered when ignition is on.

Any thoughts?

poptopclk

Amp is too big to fit in the R230 storage box so I want to tap directly into the battery in trunk and just run the speaker wires to rear shelf in the cabin.

WHAT IS THE BEST ROUTE TO BRING SPEAKER WIRES FROM TRUNK TO BEHIND FRONT SEATS SL550 R230 2007
Thanks