[Housteau]

Of the following choices, which is now considered the best method to treat room corners for bass and how much better is it than the others?

1)  completely fill the corners floor to ceiling with triangular cut sections of rigid fiberglass, or equal substitute
2)  straddle the corners with DIY, or manufactured acoustic panels
3)  use specially manufactured triangular corner treatments
4)  some other method

[JackD201]

It all depends on whether space is a factor and what particular frequencies need to be tamed. May I ask what frequencies are problematic?

[Housteau]

It all depends on whether space is a factor and what particular frequencies need to be tamed. May I ask what frequencies are problematic?

Actually none.  I went through this process for broadband treatment a while ago with help from this forum.  My choice then was the DIY corner fill method along with DIY standard frame absorbers for other areas of my dedicated space.  I have various photos in my links at the bottom of my posts.

My questions here are with a dedicated listening room in mind and space not being an issue.  I am just curious with all the new products available, what the best method of attack would be for someone setting up a new room.  It is not so much a question of DIY vs manufactured, or cost, but of the physical method itself and which is optimum?

[Big Red Machine]

I did #3 by cutting 2x4 foot sheets of 2" 703 into 8 pieces on the table saw and stacking them.  IIRC this is the ultimate method to trap anything and everything in corners vertically as well as horizontally if you have a ceiling issue, like a beam.

[Housteau]

I did #3 by cutting 2x4 foot sheets of 2" 703 into 8 pieces on the table saw and stacking them.  IIRC this is the ultimate method to trap anything and everything in corners vertically as well as horizontally if you have a ceiling issue, like a beam.

That would actually be #1 on my list and what I had done as well.  My idea for #3 was for the premanufactured triangular corner traps now available.  I will reword what I wrote for #1 on the original thread starter.

[Big Red Machine]

I built a face frame with cloth covering and pressure fit it over the corner traps between floor and ceiling.  I cut out clearance for the baseboard and beveled the frame accordingly.

[bpape]

1 or 3 depending on what you want vs what's available.

Bryan

[zybar]

I did #3 by cutting 2x4 foot sheets of 2" 703 into 8 pieces on the table saw and stacking them.  IIRC this is the ultimate method to trap anything and everything in corners vertically as well as horizontally if you have a ceiling issue, like a beam.

That would actually be #1 on my list and what I had done as well.  My idea for #3 was for the premanufactured triangular corner traps now available.  I will reword what I wrote for #1 on the original thread starter.

I have the Realtraps Tri-Corners in the upper corners of my room and they work very well.

http://www.realtraps.com/p_tri-corner.htm  (that's my room and my little brother in the pictures)

George

[JackD201]

It all depends on whether space is a factor and what particular frequencies need to be tamed. May I ask what frequencies are problematic?

Actually none.  I went through this process for broadband treatment a while ago with help from this forum.  My choice then was the DIY corner fill method along with DIY standard frame absorbers for other areas of my dedicated space.  I have various photos in my links at the bottom of my posts.

My questions here are with a dedicated listening room in mind and space not being an issue.  I am just curious with all the new products available, what the best method of attack would be for someone setting up a new room.  It is not so much a question of DIY vs manufactured, or cost, but of the physical method itself and which is optimum?

Oh, I see. From my experience 1 or 3 for broader bandwidth attenuation and for frequency specific (80hz and below) leaving the rest fairly reflective, membrane traps. I guess membrane traps would fall under no.4.

[Housteau]

It appears that mass bulk thickness of rigid fiberglass in the vertical room corners is still a good way to go then.

Now, what about the wall / ceiling corners?  Would it be better for someone to build in an actual acousticly designed soffit, or would the same kind of triangular bulk fill be best there as well? 

[bpape]

The soffit type design will reach deeper into the bass.  Same thing applies in the wall/wall corners though - they just take up more floor space which can be at a premium.  A 12x12" will give you the same surface area as a 17x17x24" triangle but have more average thickness. 

Bryan

[Housteau]

The soffit type design will reach deeper into the bass.  Same thing applies in the wall/wall corners though - they just take up more floor space which can be at a premium.  A 12x12" will give you the same surface area as a 17x17x24" triangle but have more average thickness.
Bryan

So, the largest square (not triangle) of rigid fiberglass, or equivalent that one could afford to place into their corners given practical room constraints would be the way to go.  A square of material in a corner has the optimum geometry for maximum absorption of the lowest bass. 

[JackD201]

The soffit type design will reach deeper into the bass.  Same thing applies in the wall/wall corners though - they just take up more floor space which can be at a premium.  A 12x12" will give you the same surface area as a 17x17x24" triangle but have more average thickness.
Bryan

So, the largest square (not triangle) of rigid fiberglass, or equivalent that one could afford to place into their corners given practical room constraints would be the way to go.  A square of material in a corner has the optimun geometry for maximum absorption of the lowest bass.

As far as velocity traps are concerned, yes.