KU4FIZE wrote:One shop says the stock speakers will work if we bypass the factory amplifier, the other says it wont work because it has the individual amps.
You'll only be able to use the pre-outs from any head unit - no amp. If you do that, you just need to get the right harness adapter, if necessary. The sound and power won't change much at all. In that case, the ohms don't matter much.
But if you're looking to boost the amps, you have to replace the speakers, too.
The speakers have their own individual amps. The head unit is pre-out. No such thing as a "factory amp" on this one.