As brownsfan suggests all these companies will over-sell you. Not that their products are not good but it helps if you know what you want ahead of time but doing some experimentation. Find your 1st reflection points using the mirror method and dampen them in series using cheap acoustic tile.
https://www.parts-express.com/sonic-barrier-fwp122-studio-acoustic-foam-wedge-panel-12-x-12-x-2-black-12-pack--260-547
Dampen the front wall first then the side walls. Some people actually like the look of the tiles. Once you have it figured out you order the size and number of decorative panels you need. I am not a fan of bass traps. I have measured several rooms with and without bass traps and have not found any alteration standing wave location or intensity.
In damping the reflection points correctly you should notice that the image solidifies like a picture going into focus. Once you have the proper image you can stop. To get the best bass possible in your room get a rolling desk chair and roll your self back on forth in the area of your listening position to find the spot where the bass sounds best to you and plant your listening chair there.
Dampen the front wall first then the side walls. Some people actually like the look of the tiles. Once you have it figured out you order the size and number of decorative panels you need. I am not a fan of bass traps. I have measured several rooms with and without bass traps and have not found any alteration standing wave location or intensity.
In damping the reflection points correctly you should notice that the image solidifies like a picture going into focus. Once you have the proper image you can stop. To get the best bass possible in your room get a rolling desk chair and roll your self back on forth in the area of your listening position to find the spot where the bass sounds best to you and plant your listening chair there.