KEF Q550 Floorstanding Speaker

Configuration
Two and a half-way bass reflex floorstanders

Drive Units

130mm (5.25in.) aluminum Uni-Q
25mm (1in.) vented aluminum dome HF
130mm (5.25in.) aluminum LF
2x 130mm (5.25in.) aluminum ABR
Frequency Range Free Field (-6dB)

45Hz
Frequency Response (+/-3dB)
58Hz - 28kHz 

Crossover Frequencies
2.5kHz

Sensitivity

87dB (2.83V/1m)

Impedance

8 Ohms (min.3.5Ω)
Maximum Output

110dB 
Amplifier Requirements
15 - 130W
Dimensions (H x W x D)

873 x 180 x 278 mm
926 x 299 x 310 mm (with Plinth)
Weight
14.5kg