Acoustic treatment on the ceiling

[John_H]

The ceiling-to-floor dimension is likely the shortest dimension in the listening room, and the source of problematic bass resonances; hence the ceiling space right above the loudspeakers is where absorptive bass treatment works best. Click the blue “System Photos!” link below and scroll down for a photo of a ceiling treatment example.

System Photos!

[image] For diffusors to have adequate bandwidth reaching into the lower midrange and upper bass, the wells need to have far more depth than a couple of inches. It’s the “quarter wavelength” rule - bandwidth equivalent to ~4x the well depth. In my system, I’ve allocated 18 inches to the depth on my front wall for the installation of P17 quadratic diffusors. The entire front wall assembly, including the four diaphragmatic bass absorbers columns and supporting steel frame lifting the modules …