I wasn't tying to be cute or antagonistic with anyone here.
Can I ask? My short run of flex duct to my living room register from the plenum is so darn short...just an elbow and 12" of flex duct to the register box.
You can practically hear the blower motor running and stick your arm down the plenum..lol.
Would this be a solution? Put an elbow on the plenum going the opposite direction, then "mosey" a 12' flex duct back to that register box.
Would that not tend to decrease the noise of the existing duct being in such close proximity from plenum to duct box?
I think I might just settle for that if you guys think it would help. My main concern is noise at that register box. I thought the rush of air was an issue too, but I may just drop that as a concern. Also...dealing with a one floor condo with small HVAC closet in the hall probably isn't the easiest thing to remedy with regards to noise. I may just live with it. It's not terrible.
I didn't mean to get so obsessed with it. Sorry.