KEF

Q150

speaker

$300

Used market: $215*

Find at Thomann Manufacturer datasheet

Specifications

6 of 7 values have a recorded source

System Type: Passive Bookshelf·
Input Terminals: Binding posts✓
Min Impedance Dip ohms: 3.7✓
Nominal Impedance ohms: 8✓
Recommended Power watts: Max Continuous: 100 · Min Continuous: 10✓
Sensitivity dB 2.83V 1m: 86✓
Release Year: 2017·

Expert Audio Engineering Commentary

Headroom Notes

86 dB at 2.83 V / 1 m. Because the nominal load is 8 ohms, 2.83 V is exactly 1 W here, so this figure needs no correction — unlike the 6-ohm speakers it is usually compared against. It is a genuinely quiet speaker: the Uni-Q's low sensitivity is the price of its dispersion.

Amplification Warning

KEF prints both numbers: 8 ohms nominal, 3.7 ohms minimum. The 3.7 is the one an amplifier actually meets. A receiver rated only into 8 ohms will run at roughly twice the current it was specified for wherever that dip sits, and a cheap AVR's protection circuit is the thing that notices first. Treat this as a 4-ohm load when choosing an amplifier.

* Estimated with the depreciation fallback (~72% retained value). · checked on 8/5/2026