Interesting..... The reason I love my Madstad is that it removed all wind noise with my 1/2 helmet so I no longer wear ear plugs.
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Completely agree with Ixol Phaane and wjduke . . . very recently switched out my stock '13 chrome for a set of black from a '15 and the tone is definitely improved. No drone issues here at all -- running with a 14" klockwerks windscreen. Wasn't looking for "loud" (been there done that with Hard Khrome res-techs on my VTX) so the black '15 exhaust hits the mark perfectly for this guy. Added benefit is the new visual aesthetics of the black pipes. So while not a major difference overall the pros far outweigh any cons.
I'm getting old and my memory is going away, :icon_wink:
...but iirc, I was rolling with the 11/19 (?) Baggershield when I noticed some drone. It wasn't unbearable nor particularly loud, but I noticed it. It showed up at fwy speed...70-75 mph... and only when I had the tall shield up. After installing the Madstad I never noticed it. I've also since swapped the pipes so it's totally a non-issue anymore.
Some guys change the shield and eliminate it. Others swap pipes. And apparently even different helmets make a difference. Then of course some riders never notice an issue at all. Voodoo! Acoustic anomaly.
[edit] Of course, if you just let your HD buddies ride up front you'll never have to worry about any drone that might come from the F6B! :stirthepot: