I used them in a living room, with very good efficiency for taming an SVS. A bit too big for me, I think the 20 cm width version would have been better in terms of relations with my wife :)
The bass traps are okay, but I think 2 of the ones I bought were older in production. I say this because I used a special spray for gluing the foam to the wall and only 2 of them fell off. You could see that the foam looked a bit aged, not to say rotten. I re-glued them again and hope they hold now. Other than that, I have no complaints. From an auditory point of view, they do their job at an acceptable level.
My speakers start from 46 Hz, and I don't have a subwoofer.
Good... so the speakers are on the long side of the room, 30 cm away from the back wall and over 1 meter, even 1.5 meters from the side walls.
I put two bass traps in the two corners of the wall with the speakers.
I made a mistake because I completely "dried" out the sound.
I tried the initial placement of the homemade bass traps again: I only used one bass trap in each corner, but much above the floor, meaning half of the bass trap is at half the height of the speakers.
And in the listening spot, on the wall opposite the speakers, to my left, a piece of furniture formed, together with the corner of the wall, a niche where I also put a sponge, bass trap, but here directly on the floor.
I eliminated a lot of the echoes I had before isolating the corners.
I also tried without bass traps, empty corners, but the difference is huge!
I don't know how it would behave at frequencies below 40 Hz, towards the subwoofer (yeah, according to "evolution", because if we go by the old school, you shouldn't need a subwoofer, the speaker should go alone down to about 35 - 38 Hz, without help from artificial stuff like a subwoofer. But that's another story...).
In conclusion, satisfied.
Probably the most acceptable in price.
It's a good product. Cuts easily with a cutter.
You can form corner squares by joining two elements.
I used it for the joints between two and three walls (2+ceiling), catching the elements between the thin board.
Delivery was done in excellent conditions, in two days.
12 MP camera, B&W 603.
Before: bass resonance even with the flowports blocked. Some tracks were almost impossible to listen to at high volume.
After: round, defined, and precise bass. Resonance, if any, is very low.
Everything is fine, there were a few issues with the delivery but it got resolved in the end. The only problem is that both bass traps I ordered are dented, probably because they wrap them in very thin foil... they should be put in bubble wrap, I think they would be better protected. Other than that, I'm satisfied with the products, the dimensions are as specified, everything is okay.
I received the products packed in thin nylon foil, which seems risky to me considering they came via courier. I think the packaging should have been cardboard or something similar. The dimensions are as mentioned on the site, but it still seems to me that there's less absorbent material than I imagined, with considerable material lost towards the edges. I installed 4 pieces in the upper corners, but I appreciate that with the amount of absorbent material in this product, I will need to purchase another 8 pieces to achieve the desired absorption effect. Overall, I am satisfied with the product, just that I imagined it to be bulkier.
They do their job well, you can really hear the difference as it fills the space, the normal background noise in the room is 'dry' if you stand close to it, reflections are completely gone in the corners treated with this.
As a small aside, I find the smell of this (which is NOT overwhelming) very pleasant. I recommend it, the price is very good, and soon I will probably buy another pair. Thanks for your patience (two were a bit nicked in places and even though they were busy, they took the time to find me others that were in perfect condition in the warehouse). I recommend!
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