Bass traps - foam cushiony items from Amazon ok?

Three month wait? I understand, we all get impatient. But the payoff at the end will be far greater than slapping up a few foam panels.

http://arqen.com/store/vicoustic-vari-bass-helmholtz-resonator/

These work very well..

Checking on a deal right now, I need 8, total of 4 boxes..

I'm thinking a little more Art Deco on the patina.. Touch of Queen Ann, in other words cock that crown to one side.. Just like the Yanks.. :-)

The vri-bass resonators are interesting, but expensive and they offer no measurements, or pictures to see what they look like in a room.
Compare to the GIK soffit traps, which are about $250 each and are also effective around 50 Hz.

@jumia if you want to put together some simple bass traps for cheap, call your local commercial/industrial insulation company and ask for some dense semi-rigid fiberglass panels. Leftovers from a job or whatever. Then cut/stack them together into tall thick cubes or triangular prisms, wrap them in some breathable cloth, and place them in your room corners or wherever you want to experiment.

Erik, they are adjustable. They look like 2001 A Space Odyssey. A buddy has 12 of them, pretty interesting.. 24" tall and about 15" across. He wouldn't let me take one apart.. LOL Look like modified SonoTubes, but all fixed up..

A 16" x 48" SonoTube is 15-20.00 USD at Lowes or Home Depot.  I'm thinkin.. :-)

One tube inside the other with a slot cut about 2" wide on the inside one.
Top to bottom.  Fix a top to it out of plywood 1/2". Stand 1"slats upright on the lids in a star pattern, on the underside. Drill your 5 holes between the slats drop that top in the Sonotube. Silicone it in place.  Then slide it up and down for the control you want. Mark it, remove the inner tube dampen it with heavy fiberglass insulation and slide it back in place. The bottom the same way, just no holes.

On its side and use the bottom too (have to drill), 2 6 footers aught to do it, on their side of a room, holes either end slot facing out at a 45 degree angle..

It might need something like black hole for the inside tube liner add another 10-20.00 usd for something like a peal and stick..

I can make better ones for 200.00 for 3 or 4. The problem is the "I can make part", has just about wore me out.. LOL 400.00 tops for 4 NICE ones

Less paint or fabric covers. I think covering the tubes with mylar first and then with a porous speaker grill fabric..  The plywood lid would be easy to finish with a nice veneer add 10-100.00 per veneer, just depends how fancy you want it, ay? Bottom set them on spring packs if they are upright..

Regards