How To Fit Sub To CD400 Head Unit

[TUFFKNUX]

Today I made it my mission to fit my Fli 12" subwoofer into my Astra.

Tools you will need:

Speaker to RCA converter: £6.99 from eBay. I suggest this one as it fits snug behind the CD unit: HERE (see photo below)

Screwdriver set (a few sized flat and phillips)

Electrical Tape

Patience & Time.

First of all you're going to want to remove the stereo system. If you're unfamiliar with how to do this, there is a How-to by Rusty2009 HERE that shows you how to do this. Now you need to focus on the big wiring loom/plug that you pulled out of the CD unit and the speaker to RCA converter. Strip the ends of the converter speaker wires and double over to make them a bit thicker. Now look at the back of the wiring loom and it should look like this:

Use this diagram to help connect your speaker to RCA adapter to the correct terminals:

(This is a view from the front and remember, you're working from the back of the loom/plug)

To connect the terminals, just push them into where the current wire is sitting but make sure it gets a grip and doesn't pull out too easy. Once you've pushed all four speaker cables in firmly it should look a bit like this:

Now make sure you re-wrap the group of wires up with the rest of the wires to save them from coming loose and/or falling out.

The reason I recommended the converter I have done is because it sits perfectly behind the CD unit:

I then attached the remote on/off (antenna) cable to the spare terminal in the cigarette lighter the same way as I did with the CD loom/plug.

It's now up to you how you run the cables through to the back of your car. I ran mine underneath the door trim through into the boot.

Another issue that may arise is getting the power cable from the engine bay into the passenger foot well. I used the biggest phillips screwdriver I had and from the the passenger foot well, pushed the screwdriver through the grommet (be careful not to catch any cables). Once I could see the screwdriver from the engine bay side, I taped the power cable to the screwdriver and pulled it back through. This may take a few attempts (electric tape doesn't work).

Once you have the power cable linked up to the battery and inside the car just transport it to the boot as neatly as you can.

For the earth cable, there's an earth point in the right hand light panel in the boot. All I needed was a 10mm washer and nut and the sub was earthed.

Link all the sub cables up to the sub, cross your fingers and crank the stereo up!

If you need anymore pointers, give me a shout in this thread.