Yep, those above are just FRZ's (first reflection zone) panels. For corners you want bass traps, which is where bass likes to collect. After adding mine the before/after graph I did improved a lot. First graph no treatments, 2nd graph with FRZ's and bass traps. Keep in mind this was when my room was 30ft x 31ft. Also, this was back in the M60 and ep 300 days, before my current 3 sub setup. First the graphs.











M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85