Depending upon the impedence of the speakers and what kind of setup you have
it may not matter. The simple answer though is that you would need to
connect the speakers in parallel vice series to avoid ruining the head unit.
If you connect the two speakers in parallel, you get half the impedance.
8 ohm speaker + 8 ohm speaker in parallel = 4 ohms.
8 ohm speaker + 8 ohm speaker in series = 16 ohms.
If you are using a factory radio, then you need a 10 ohm speaker as Delco
used a 10 ohm speaker for most of the years. An 8 ohm will drive the output
transistor too hard. Also, many factory speakers used an output transformer
mounted on the speaker. I believe that was only midyears. Installing a
speaker without the transformer, if originally equipped, will blow the
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