The KEF XQ30 is an appealing slender floorstander from KEF's new XQ range, which currently includes a larger floorstanding loudspeaker, two compact two-ways and a centre channel speaker.

Currently there's no subwoofer in the range, although a dedicated model with matching finish will probably emerge in due course, although KEF does have subs in other ranges.

The XQ30 is the smaller of the two floorstanding models, an impressively slender compact that stands well under a metre tall and which, in the case of the test pair, is finished in a very fetching black gloss with a fine lacquer finish.

Robust build

It's a three-way speaker, with a smallish dedicated bass driver supplementing a Uni-Q driver which, as always, incorporates a tweeter at the acoustic focus of the bass/midrange unit.

The system is front-vented and is equipped with discreet outrigger feet at the back, where the enclosure is at its narrowest, for stability.

KEF supplied the speaker with two different sets of floor-mounting hardware, a set of small pads which are intended for use on polished floors and carpet-piercing spikes.

Also in the box are foam inserts to help tune the reflex port. If you find the system overblown in the deep bass, then use the foam plugs to tune the bass down to around the port resonant frequency, which is somewhere in the 55Hz region.

Tangerine Waveguide

Although KEF's patents on Uni-Q have lapsed in many territories, the technology has not been widely emulated elsewhere, though Tannoy use an alternative technology which does a similar job with Dual Concentric.

Over the years, KEF has progressively refined Uni-Q to keep it abreast of the market and the XQ range uses completely revamped Uni-Q drivers. Two areas in particular have been addressed.

First is the new profile for the interface between the tweeter and the bass unit, where the cone not only acts as a kind of horn loader for the tweeter, but is constantly moving fore and aft, therefore making this a tricky system to optimise.

The new design is said to offer a much smoother tweeter response and improved coupling between the two drivers. The other key change is the addition of the so-called Tangerine waveguide (the Tannoy counterpart, by the way, is known as the Tulip waveguide).

This is a shaped piece, which from the front resembles a segmented tangerine in cross section and is placed in front of the tweeter in close proximity to the dome. It's designed to apply acoustic loading to the tweeter diaphragm, which increases towards the edge of the dome, where the dome geometry least resembles an ideal section of a pulsating sphere.

Along with other changes, the units are said to offer better dispersion, improved integration and considerably reduced levels of harmonic distortion.

Enclosure design

Construction of the system as a whole is undeniably impressive.

The XQ30 is compact and elegant, with a teardrop cross-section using curved vertical panels to suppress internal reflections and cabinet resonances. The enclosure is equipped with high-quality bi-wire terminals.

Both larger cones are 130mm in diameter and the tweeter domes are made from aluminium, with an elliptical profile 19mm in diameter, rather than being hemispherical.

Crossover frequencies are 450Hz and 2.5kHz , though the order of the crossover is not specified, sensitivity is rated at 87dB and impedance is rated at 8 ohms (nominal), though it dips down to 3.2 ohms. Power handling is up to 150 watts nominally and the system is magnetically shielded.

Tonal brightness

There are clear parallels between this model and the XQ20, as the XQ30 perpetuates the lean, dry balance of its smaller counterpart.

Its main components are a degree of tonal brightness and a suggestion – usually no more than this – of aggression associated with the mid treble. So the dry, bright tonal balance referred to in our review of the smaller XQ20, is mirrored here, but on the whole this does little to mar the listening experience in practice.

In the near field, the XQ30 is clearly very clean and explicit, while in the far field the system presents music with an almost tactile immediacy.

The XQ30 can be a bit fussy about the quality of recordings as it occasionally has the effect of emphasising their less desirable qualities.This is especially true of recordings that could be criticised as sounding overtly 'digital' in character, though unusually this also extends to some SACDs as well as Red Book CDs.

Bass extension

Our review of the XQ20 also identified some dryness in the bass registers and you might expect this larger model to be more extended in the LF, but the numbers don't support this: the -3dB point is 53Hz, 1Hz poorer than the XQ20 and, in practice, the balance of the bass against the overall sound is unlikely to be much different.