Equal room dimensions boost and distort low-frequency loudspeaker response

Evidence

If the dimensions are the same, one has a low-frequency response that rises 9 dB above the mid-band response and that has significant variation over the frequency range—in particular when the distance between the loudspeaker and the boundaries is just above a quarter of a wavelength. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2136

Categorization

• CANDY: A concrete number—9 dB of bass lift—explains in one line why bare rectangular rooms sound boomy.