I had 2 car speakers lawing around a while ago so I decided to at an output to them. And when I plugged them in to my great surprise they sounded both as loud.
Tools you will need
-Soldering Iron (with solder)
-Hot glue gun
What you will need
-None amplified speakers (make sure that the number of watts is not higher that the amplified one's)
-Amplified set of speakers
Step 1: Open the Speaker
You have to open the one with the circuit board basically its the one with the AC port. But on the pic I opened the wrong speaker. And keep the screws.
Step 2: Drilling Holes
Find the good spot for the terminal. Then mark the spot you will drill to make pass the solder (its the thing circled in red on the picture). And drill until it fits.
Step 3: Soldering
Solder wires to the terminal, these wires will be connected to the speaker output.
Step 4: Hot Glue
I used hot glue to fix the terminal to the speaker but you could use anything: Screws, superglue, double side tape, etc. And now you will have to decide weather up or down is the left or right output and the opposite. I just carved a L for the left.
Step 5: More Soldering
If your MAIN SPEAKER (the one with the amp) is lets say the right one. Cut the wire that go's from the circuit to the speaker and make it go to the terminal. And at the cut to the same but for the speaker.
Step 6: Soldering Again
Find the wire that go's from the main speaker to the other one. So in my case from the right to the left. So you will probably see a hole on the back of the speaker. So make pass the wire in and out from the hole and do the same thing as the other step.
Step 7: Screw It Back
Just screw everything back together.
Step 8: Finalising
For the wires going from the car speakers to the speakers I just took wires and twist them together to get the right length. You could solder them if you wanted to. But finally its sounds great. Since there car speakers that means they are neutral so with a sub it would sound even better. You can listen to the video to know how good it sounds.BUT MAKE SURE THAT IF YOU WANT TO ADD A SUB MAKE IT RUN TROUGH A CONSOLE OR SOMETHING LIKE THAT OR ELSE IT COULD BURN OR SERIOUSLY DAMAGE YOUR AMP.