I have the Fein Turbo I myself, it’s a nice little quiet sucker (pun intended). I still find the cutting noise to be the loudest part of the equation. Having said that I run a SuperPID on my Dewalt and at 30,000RPMs it is “that” much louder than the standard 27,000…but still quieter than most of my cuts (I cut a fair amount of plywood, which is loud). I bought a set of Bluetooth earmuffs and now I can’t hear anything, plus I get music!
Dan