The 2nd layer is no where near as important as SEALING OFF THE WALLL thats priority
#1 and should soley be your purpose in life right now if you expect any i mean ANY results. 2nd layer of wall is not gonna fix the fked up acoustics you are having right now with no seal.
alll your output and not hitting lows issues is PURELY from not sealing your wall off. YES it has that effect. All other factors are ants compared to that big @ss elephant in the room issue. You think it looks sealed off right now but its NOT. not even a single peep of air can go back there to the hatch.
Afterwards try plugging up one port and see what results you get. THEN do extra layers.
lol someone didnt read the thread HAHAHAHAA