I were actually also wondering about the HF…
Found this on
http://www.digitalhomemag.com: “The Q55.2 Series carries KEF's Uni-Q technology, which means the tweeter is effectively hidden. This tends to make the speakers appear less well equipped than their rivals. The centre (Q95C) and rear effects (Q85S) speakers, for example, look as though they have just one drive unit apiece, but the reality is that the tweeter is hidden at the centre of the bass unit”
Also found these specs on the KEF website:
Q55.2 Specifications
Cabinet Design Two and a half way bass reflex
HF Drive Unit 19mm (3/4") ferrofluid - cooled soft dome tweeter
MF Drive Unit 160mm (6.5") polypropylene cone
LF Drive Unit 160mm (6.5") polypropylene cone
Crossover frequency 3kHz
Frequency response at 15°
horizontally off axis ± 3dB 40Hz - 20kHz
LF Corner -6dB 37 Hz
Sensitivity - 2.83v @ 1m 91dB
Maximum output - typical in room 112dB
Magnetic shielding Yes
Amplifier requirements 10-150W
Impedance 8 ohms
Internal volume 28 litres
Weight 13kg (29lbs)
Dimensions
(H x W x D) 852 x 207 x 276mm
33.5 x 8.2 x 10.9in.