Speaker specs like ±3 dB 80 Hz-18 kHz convey almost no useful information

Evidence

It is obvious that a simple product specification like ±3 dB 80 Hz to 18 kHz contains almost no useful information for consumers, especially in the common situation where there is no tolerance and no description of how or where it was measured. — Toole, Floyd E, Sound reproduction- the acoustics and…, 902