Looks like tre R45 has more baffls, about 20% more volume and is 33% heavier. Shouldn’t be a big surprise that it out-performs the R9. I don’t have a R45, but if it out performs the R9, it should be pretty awesome. That said, YHMs website rates the R45 at 132 dB and the R9 at 123 dB. I sssume...