Hi
Im taking Ethan's great advice and working on corner traps for my small room first. I am making the corner traps with sheets of 100mm 48kg/m2 polyester. Im very concerned with the 150hz and below region . I have read many pages of this forum but I still I have a few questions:

Corner Traps:

1.Do the Corner Traps need to be fixed to the wall or can they just stand against the wall? Will it help to have them fixed?

2.Filling the corner airspace behind each trap up with a dense material (superchunking) - possibly using the acoustic foam corner traps I currently have - will this improve their effectiveness?

3.Is a 600mm wide face enough? Would increasing the width get better bass absortion? (although that does eat up more room).

For making sealed, wall mounted bass traps:

1. Will making the airspace deeper absorb lower frequencies? ie. moving the fiberglass further from the wall.

2.Could the traps be designed to have a wooden backing (all sealed), as well as fronting, so the traps do not have to be sealed against the wall? I supposed this is similar to the GIK monster traps. The traps could then be moveable....would their effectiveness be reduced by this?

3. Does thicker plywood absorber deeper frequencies better?

Thank you! Sorry for any spelling mistakes
R.

1. Corner traps are generally placed straddling corners. However you can mount them is fine.

2. Yes, but it's not twice as effective even though twice the material is used.

3. The wider the better.

1-3. Do you mean wood panel traps? That type of trap is tuned, so the thickness of the front and the cavity depth together determine the center frequency. I usually advise against that type of trap for small rooms.

--Ethan

Thanks Ethan

May I ask why you advise against them (just out of interest)?

Thanks
R.

Small rooms do better with broadband absorption straddling corners. Larger rooms benefit from wood panel traps flat on the walls, because they can go down to 90 Hz with only four inches of thickness.

--Ethan