5040
speaker
$1,300
Used market: $935*
Specifications
7 of 6 values have a recorded sourceExpert Audio Engineering Commentary
Amplification Warning
Two 125 mm mid/bass drivers in parallel, 6 ohms nominal, 3.0 ohms minimum — the lowest of the Q Acoustics models in the catalogue. 91.5 dB at 2.83 V is about 90.3 dB/W/m, so the speaker is genuinely efficient; the difficulty is current, not voltage. An amplifier that roughly doubles its rated power from 8 to 4 ohms will be fine here; one that shuts down instead will not.
What the datasheet actually says
Quoted verbatim from the manufacturer’s own page, with the date we checked it. We state what is printed, not what anyone intended by it.
«Sensitivity (2.83V @ 1kHz) 91.5 dB/w/m»
Three parts of this single row disagree. The drive condition is 2.83 volts, the unit is decibels per watt per metre, and the distance appears only in the unit and not in the condition, which instead names a frequency of 1 kHz. On the 6-ohm nominal load declared on the same page, 2.83 V is about 1.33 W, so the volt-referenced and watt-referenced figures differ by roughly 1.25 dB. We follow the measurement condition, because it describes what was physically applied to the terminals, and store the number as a 2.83 V figure. The neighbouring 3000i series pages print «Sensitivity (2.83 Vrms@1 m)» without the dB/w/m suffix.
checked 8/5/2026* Estimated with the depreciation fallback (~72% retained value). · checked on 8/5/2026