TL;DR: Three different tools solve three different problems. Absorbers remove reflected energy and shorten reverberation. Diffusers scatter sound to keep a sense of space without deadening the room. Bass/resonance control tackles low-frequency build-up that ordinary panels can't. A good room uses the right mix — not just more of one.
Absorbers
Porous absorbers convert sound energy to a tiny amount of heat, reducing reflections and reverberation. They work best at mid and high frequencies; reaching low frequencies needs much more depth. In C-ATS terms this is the Reverberation Control Panel — a broadband absorber.
Diffusers
Diffusers scatter a reflection in many directions instead of removing it. Used well, they preserve liveliness and spaciousness while still controlling problem reflections — useful when full absorption would leave a room sounding dead. The C-ATS Reflection Control Panel is tuned to control and scatter early reflections rather than simply absorb them.
Bass / resonance control
Low frequencies behave as room modes — standing waves that make bass boom at one seat and disappear at another. Thin wall panels do almost nothing here. The answer is dedicated, corner-loaded control: the C-ATS Resonance Control Panel, measured for low-frequency performance in corners.
| Tool | Solves | Works best at |
|---|---|---|
| Absorber | Reverberation, harshness | Mid / high frequencies |
| Diffuser / reflection control | Imaging, early reflections | Mid / high frequencies |
| Resonance / bass control | Modal boom, uneven bass | Low frequencies |
The mix matters
Over-absorb and a room sounds lifeless; ignore bass and it booms however many panels you add. C-ATS frames this as the three Rs — reflection, reverberation and resonance — each with its own panel. See The System.
FAQ
Do I need diffusers or absorbers?
Usually both. Absorbers control decay; diffusers/reflection control preserve a sense of space and protect imaging. The balance depends on the room.
Will absorbers fix my bass?
Not thin ones. Low frequencies need dedicated, corner-loaded resonance control, not standard wall panels.
Can a room be too absorptive?
Yes — an over-damped room sounds dead. The goal is balance, not maximum absorption.