Question: are 4 ohm speakers louder?
Answer: If your amplifier is designed to drive a 4 ohm speakers, then 4 ohm speakers will play louder at the same power than 8 ohm speakers. ... The only thing you can say for sure (and even this isn't really true*) is that for the same voltage, a 4 ohm speaker will conduct more current than an 8 ohm speaker.