Bear with me. The last time I fooled around with car audio was when I installed a stereo in my best friend's 1977 Ford Granada in 1981...

I removed the the cover behind the rear window and removed the old speakers just fine, but before I just slap things together, I have a few questions:

1) The old speakers are the originals. The following information is stenciled on the magnet, "DELCO ELETRONICS 10 OHM". My new Pioneer 6x9 speakers are 4 ohm speakers. Is this a problem?

2) Every speaker that I've ever installed speakers it has simply been a solder or 2 female electrical connectors (one for positive, one for negative) on male connectors the speaker. The existing speakers had a "custom" connector that mates up to the speaker. On the driver's side, the wiring has one brown wire and one yellow wire. On the passenger side, both wires are blue (!?). On the Delco speakers, the two connections are labeled "A" and "B". How can I tell which is positive and which is negative?

Any help would be greatly appreciated.

 

Get a C or D battery and two pieces of speaker wire, put one wire on the + end of the battery and the other on the - then touch the wires to the speaker terminals, if the + wire from the battery is connected to the + speaker terminal and the - to -, the speaker driver will move upwards if the polarity is reversed the driver will move down.

 

Well, before I saw your post, I went for the "trial and error" method.

I wired up the speakers and tried it. The driver's side speaker sounded awful and the cone was bouncing like crazy. So, I flipped the wires on that one and everything is fine.

Now, it exposed a bad rattle in the driver's side rear somewhere. Wonderful.

I'm still curious about the ohms...

Thanks for the reply.

 

Ohms = resitance, 10 ohms is much more resistance than four. ohms are rated per speaker so there should be no toruble with switching 10 for 4.

 

I would have to disagree. Switching from a speaker rated at 10 ohms to 4 ohms will reduce the impeadance considerably. By doing that you will effectively force the amp inside the head unit to produce 2.5 times the power that it is rated at. Although this may sound good, by doing this it will produce much more heat and draw more current then what you radio can handle, melting the internals and possibly starting a fire. Fire is unikely becuase fuses should kick in before that. This is assuming that you are still using the factory deck. If you have purchased an aftermarket one you have nothing to worry about as all aftermarket decks are rated at 4 ohms. I would just take a trip down to a local stereo shop and ask them, most decent shops are very friendly and wont mind giving you a few free pointers.