Reply 8 years ago on Introduction. Walmart sells amplifier kits as do some other stores. The other side of the firewall should be the inside of the car. Not Helpful 5 Helpful If you have a stock stereo and you have the remote wire there you want to in twine the remote wire with the power wire before inserting in the power slot for amp. It's a small box that has 4 input wires and the 2 necessary RCA output that will run to the amplifier. Not Helpful 15 Helpful
Last thing you need is a dead battery.
Installing Subwoofers in a Car
Can any of you help me. Always remember to shut off the amp if you do so manually Soldering 12v power and ground connectors to the wires will reduce circuit resistance and make your power cleaner, giving you better sound. The remote wire needs a 12v signal to turn on the amp. DavidJ42 3 years ago on Step 2. There is a blue wire with a white stripe hanging out of the back of the deck known as the remote wire.