I wouldn't doubt it. First of all, there is more cone surface which would mean that there is more air moving within the cabin, thus making it sound louder. And he said tehre were 5 8's, not 2. Everything all depends on install, but sometimes even that has a certain limit to it as well. I have seen an install with several 6x9 midbass speakers. I forget how many, but that shit was hitting in the mid 140's, which is what most setups hit around.