How big is your room? Unless it's very large, I don't recommend the wood panel bass traps in my older article from EM magazine. This is from the beginning of that article:
"Please understand that the bass traps described in this article are intended mainly for larger rooms. For rooms smaller than 25 by 15 feet you'll do better with broadband bass traps made from thick rigid fiberglass placed in the room corners, with more on the front and rear walls if possible. Small rooms have peaks and nulls at all frequencies, so broadband absorption is better than the tuned traps shown in this article. This is described in my Acoustics FAQ linked above."
So for smaller rooms I suggest bass traps made from rigid fiberglass only.