Highly regarded loudspeakers measured surprisingly ragged anechoic responses in the 1960s

Evidence

When I measured a few highly regarded products I was astonished at how ragged the anechoic frequency response curves looked. I expected better. Could these loudspeakers sound as bad as they looked? — Toole, Floyd E, Sound reproduction- the acoustics and…, 1919

Categorization

• XREF: Connects to modern spinorama-based speaker measurement practice; the discipline has moved from anechoic on-axis curves to multi-angle averaged data.