Originally Posted by LondonCalling
Is that the second row seating riser? If so, are you utilizing it as a bass trap? I was wondering about the gap at the bottom front left, is there a purpose for that space? Also what is that red material on the floor, is it for squeaks/rattles or moisture barrier?
The gap is for duct work. That’s floor muffler and is there to help isolate the floor from the concrete. There is a vapor barrier under that. Floor muffler will also be run between the joists and ply for the platform to prevent squeaks & I hope it might provide additional isolation.