FYI - the ZR Acoustics panels diffuse/disturb the air that sound waves ride on at a micro ("molecular") level, independent of frequency, preventing sound reflections. If there are no reflections there can be no room modes including bass modes, standing waves, etc. It follows that if you have enough square footage of ZR Acoustic panels on the wall you don't need bass traps because low frequency sound waves are no longer being reflected to any significant extent. That is essentially the manufacturers explanation and again, I am not qualified to analyze/confirm/refute that explanation nor am I interested in doing so. I am satisfied that my ears tell me that the ZR panels are superior to the RPG BAD and GIK Acoustics panels that they replaced. When it comes specifically to bass the outer two panels (see photo) that I have pressed up in the wall corners appear to have diminished whatever bass pressure buildup occurs there. Even with just the four panels (I am ordering more) the bass is deeper, tighter, more tuneful, and clearer. It also follows from how these panels work that the measurement tools and terminology of conventional sound wave based room acoustics don't apply, which leaves the conventional acoustics experts a little lost. I have read explanations from several of them as to why the ZR panels can't work, but of course they explained why in terms of sound waves, panel depth and other concepts that don't apply. Interesting situation - that's the position a disruptive technology puts you in. Here are links to testimonials and a list of clients. If the ZR panels don't work as advertised then all of these folks (and yours truly) have been duped:
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