Question: how many ohms is 2 8 ohm speakers?
Answer: Two 8 ohm speakers wired in parallel will have a net impedance of (8 divided by 2) 4 ohms. If you have three speakers, each at 8ohms, divide 8 by three to get a total impedance of 2.66ohms. If the speakers do not have a common impedance, you can use formula 1 for two speakers or formula 2 for more than two speakers.