There is no drone. Beyond initial startup, idle to me appears to be as quiet as stock with the silver key. With TracKey activated it's definitely enhanced, not excessive but more complex in tone compared to stock. Sort of like an a cappella quartet as opposed to a soloist. As smooth as a Barry White disco croon! It's when you stand on it that they really sing- a rich, exotic sound, more baritone than bass. If you like the sound of a Ferrari or Lambo, you'll love this. I suspect Corsa tuned out a good share of the bass with the drone. I am thinking of taking out my 3/4" side pipe restrictors. You will barely hear a burble at highway cruise speeds, they are that nice. Love the SBY! Never tire of the color and the Boss definitely owns it!
Hey, I saw in a post you have corsa xtremes on your boss? I have a 13 boss and am thinking of the same axle back. How loud are they really? I've read the reviews saying there is no drone, is that's really true? I'm looking for loud but not too loud to the point of not being able to talk on the highway/freeway.