How can I connect my aftermarket speakers to my 2000 Pontiac Firebird?

Question

I bought four 6 1/2 inch MA Audio HK65 car speakers for my Pontiac Firbird, and I also bought four GM car speaker wire harness to connect them but there is a problem.

My factory speakers have four wires connected to them and the GM wire harness does not fit the factory harness. I was thinking about disconnecting the four wires from the factory speaker and then twist together the two positives and two negatives and then just connect it directly to the aftermarket speaker, so that the after market speakers will be connected the the factory harness and then I can just plug the factory harness back to the car.

Please Car Professionals,or people that were in the same situation as me give me some advice to see if this will work.

THANKS

Answer 1

It sounds to me like you have a Firebird with an upgraded factory sound system, possibly a Monsoon audio system. I don't have a lot of information about them, but in just about any GM speaker system with 4 wires, you don't want to combine them together.

If your factory 6 1/2" speakers do not have an integrated tweeter, then what you have is a dual voice coil 6 1/2" "subwoofer". In the Monsoon system, these are located in the side panels next to the rear seats. If you replace them, you should just pick one of the two wire pairs and connect it to your new speaker terminals. Just cut the harness off the factory speakers, leaving enough room to re-attach it if you want to put the factory speakers back later. If you replace these speakers without re-wiring the Monsoon amplifier, you will only get bass from the new speakers no matter how you connect them.

If you have a factory speaker that DOES have an integrated tweeter, then you probably do not have a factory amplified system. When GM uses 2-way speakers with a 4-wire plug, two of the wires are for the woofer and two are for the tweeter. If it's not a factory amplifed system like Bose or Monsoon, usually the two wires going to the woofer are a full-range signal, while the two going to the tweeter have a crossover so they won't play bass. What you need to do is examine the factory speaker to figure out which pins in the factory plug are connected to the woofer, then use those wires to connect to your after-market replacement and leave the tweeter wires disconnected. This should result in a full-range sound for your new speaker. If it doesn't, then you might have a factory amp after all, and you'll either need to modify your after-market speakers or rewire around the factory amp.

Answer 2

If the aftermarket speakers are the same impedance/ Ohms measured are the same, they should work.
The 4 wires are for the four speakers usually presant in to-days cars. I hot wire for each speaker and the speakers go to ground, thus you can turn on just one or any combo and they all work.
You need to look at a shop manual to determine which wiring set up will work for you.
Try calling an audio shop for general information. Even a long distance call could be cheaper than a burn out.

Answer 3

Gm Speaker Harness