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These are very well made and very effective.
They arrive in one big but light box.
They are strong foam but still very light so easy to hang (just make sure to use strong glue because they will fall off otherwise).
There are very effective in killing the low frequencies bouncing around the back wall of my studio. I use them in conjunction with homemade rockwool baffles and EQ Acoustics Classic Wedge Tiles.
I would recommend them as an affordable alternative to an expensive customised absorber/diffuser.
The big set, as opposed to the smaller ones, does take up quite a bit of room as they come out 30cm from the wall so you need to make sure you have room for them.
quality
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best product for my anechoic chamber
Iceguy 16.10.2019
easy, light, cost effect and look fabulous.
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Cheap but efficient
Hieronymus 29.05.2020
Pasted on ceilings. Make a great difference to room reverb porformance. Down to less than 0.5 sec up from 200 Hz. Maybe a better test result if I buy more and paste them on walls.
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j
Acoustique P4 ?
jctroyes 28.10.2014
Le visuel fait penser beaucoup aux corrections effectuées en labo acoustique P4.
Il n'est est rien et n'oublions pas que nous parlons ici de correction du TR60 (temps de réverbération) ainsi que quelques ondes stationnaires.
Bien que l'on puise regretter aucune information sur les coefficients alpha sabine du produit, on peut estimer des performances orientées plutôt autour de 500hz. La densité du produit semble correcte mais pas extraordinaire. En tout cas cela reste la plus belle densité dans les gammes Thomann.
La forme des traitements permet une légère diffusion et donc assez conseillée pour le traitement d'ondes stationnaires et à l'approche des angles d'une pièce.
Déconseillé aux débutants non documenté en acoustique.
Je préfère utilisé une colle type pate qui permet l'ajustement, plutôt qu'un spray.
Prévoir un jeu d'épingles ou clou sans tête provisoire car le produit est assez lourd.
Un niveau pour aligner (voir niveau laser).