Dude is american. Outside of science, there are only a handful of things in America measured in kilos or grams. I'm struggling to think of one besides drugs. Certainly coke or heroin. Pot is often sold in eighths, while hash is sold in grams.

Nobody in America discusses weight of speakers, computers, or anything in kilos. Perhaps the only other place I've heard it used is for bumper plates. I'd frankly bet more than 90% of Americans couldn't tell you off the top of their heads if a kilo weighs more or less than a pound.