Can a 4 ohm amp run 2 ohm speakers?

Yes, a 4-ohm amplifier can run 2-ohm speakers, but it may lead to overheating or damage to the amplifier if it is not designed to handle the lower impedance. The amp will see a lower load than it is rated for, potentially causing it to draw more current than it can safely handle. It's essential to check the amplifier's specifications to determine if it can operate safely with 2-ohm speakers. If not rated for 2 ohms, it's best to use speakers that match the amplifier's impedance rating.