Most loudspeakers need equalization to correct low-frequency room resonances

Evidence

Some loudspeakers are excellent out of the box, but there are many in the middle category: good in the basic essentials but needing a bit of equalization to really shine. Having anechoic data and a parametric equalizer allows the user to finish the job. This is what is done in active loudspeakers. Some reviewers helpfully provide suggestions. Equalization is almost always needed to address the low-frequency room resonance problems that we all share, so having equalization capability is a major benefit. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1952

Categorization

• XREF: Relates to room-mode and bass-management material in earlier chapters on rooms.