Safe N Sound is fine for super chunks. BTW you could use a bit more help below 100hz, but it is not looking as bad as you might think.I took a before and after waterfall graph and my DIY acoustic panels did a pretty good job taming frequencies above 100hz but below 100 is still a major issue. I want to do super chunk bass traps floor to ceiling up front but I am not 100% sure that is the best plan of action to target every thing below 100hz. I used roxul safe n sound for the existing panels. Should I continue to use the safe n sound? Should I use OC703? Should I use something else? Does anyone have any experience with super chunks that can point me in the right direction? I am worried that I will build these bass traps and not be happy with the results. Thanks in advance.