Eco Acoustic Treatment Technical Design & Specs


Performance Through Intelligent Design

De-Fi Eco Acoustic Panels are able to match and exceed the performance of much thicker and chunkier solutions. This is thanks to the system’s integrated mount design. During the holistic design process, the panel surfaces were treated as if we were designing a speaker or a microphone. 

Instead of catching sound like a microphone diaphragm would, the goal was to absorb sound using big, floating diaphragms, built out of materials to treat specific frequencies, while also tuning air gaps. 



The patented mounting solution of the Absorbers leaves an air gap between the Eco Acoustic Panels and the wall. Not only do these gaps effectively increase the surface area that is absorbing acoustic energy, they lower the effective range of the absorbers by functioning like small traps.

The size of the air gap is not arbitrary. The minimum and maximum range are set for the ideal trapping of midrange frequencies. The minimum air gap allowed by the Absorbers is 50mm, and the maximum is 70mm. This range of air gap is also very effective when in the cloud configuration. 

Absorbers will trap frequencies associated with pitch, and not just reflective frequencies associated with sibilance, like most flush, wall-mounted solutions. The air gap allows the thinner panel material to be as effective as much thicker solutions that are mounted directly to the wall.

Bass Traps


The De-Fi Bass Trap, like the Absorber, is an open system. Open systems cover more surface area using less material, and tend to be more sympathetic to a wider frequency range, making them versatile no matter the room

The Bass Trap is also designed to be a two-way system — much like a two-way speaker — with the Eco Acoustic Panels absorbing mid to high frequencies, and the limply suspended acoustic mass behind absorbing low frequencies.



The Diffuser uses an open quadratic design, because it can be tuned to treat specific frequencies by adjusting the dimensions of the front wells. We left the side baffles open with the angled slats and allowed sound to enter behind the outer wells. This added distances that act much like the front wells, improving overall effectiveness. The angled outer slats diffuse higher frequencies in different directions, more than other quadratic designs.

Full Spectrum Design and Conclusion

Ideally, a fully treated room should incorporate all of our products. The Absorber, Bass Trap, and Diffuser were purposefully designed to work together, designed with actual musical pitches in mind, and a focus on problem frequencies that are encountered when mixing and recording. While any of our Acoustic Panels used alone can improve any room, using all of them together will improve the entire audible range. 

Tech Specs

The effectiveness of acoustic treatment is measured using the Noise Reduction Coefficient rating. On this scale, 0 represents no sound being absorbed, and 1 represents all sound being absorbed at a certain frequency range.

However, due to testing parameters and conditions, you will sometimes see ratings higher than 1. In general, a higher number is better.

When you see a single NRC number for a product that does not show corresponding frequencies, it’s usually the average NRC of the product between 100Hz to 5kHz. This average number gives you an overall indication of how the product will perform, but it’s important to check the response curve. A product with a lower NRC may actually perform better in the real world if it has a broader range, since a very high NRC at a single frequency will skew the entire average upward.

A single stack Absorber has an NRC of 0.8, which is what most 2” thick foam solutions are rated. A double stack Absorber — with six panels instead of three — has an NRC of 0.9, which is equivalent to most 3” thick foam solutions.

When purchasing Absorbers, you can also opt for double width panels, which extends the surface area coverage and performance of the Absorber without the need for an additional mount.

The Diffuser is tuned to be most effective between 847Hz to 3.4kHz.

De-Fi NRC Ratings & Effective Frequency Range





For more information on how Eco Acoustic Panels can measurably improve your studio sound, read our Knowledge Base explainer: How many Acoustic Panels do I need?




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