I have had my Cobra '6 pack' for 2 years. I don't hear a drone, but can understand what people coming from a V-twin might think is a drone. It's just 4 more cylinders firing!

I have stock speakers and with the USB music I can hear clearly at 14-18 on the radio at highway speeds. Be sure to use the buttons and turn the auto volume control system on, it will slightly increase volume as your speed picks up. I have a BaggerShield windshield 11", which I look over, and can still hear the music from the speakers. I have bad hearing from my Navy days with tinnitus and still hear it.