Having now about 20 hours on these speakers I'll give my opinion for what it is worth. There was a noticeable difference from measurements taken at 12 hours and at 20 hours so it is certain that more changes will happen.
To put things in prespective: I've had many different speakers during my life, from home built to expensive and well respected ones: sealed boxes, bass reflex, transmission line, Karlson, "metronomes", Voigt, open baffle, KEF constructor series CS1 and CS2, Focal 7" DIY bass reflex (slot loaded) kit, LS3/5A, LS5/12, Monitor Audio Studio 2, Monitor Audio Studio 12, Wharfedale Diamond 9.1 and now the Denton's.
Wharfedale was not kidding when they mentioned that they tried to recreate the voicing of the earlier model. At that timeframe record players were the medium to play at home, occasionally a tape recorder and AM radio was the main one with later FM coming in. AM had a 5Khz audio bandwidth and FM had initially 12Khz and later 15Khz. Digital did not exist. HiFi was specified as -3db from 50 Hz to 15 Khz.
The better amplifiers had rumble and noise filters. Rumble filters that had selectable cut-off frequencies of 80, 60 and 40 Hz. Noise filters had cutoff 5Khz, 7 Khz and 10 Khz. Both to help when a record was being played.
As for the Denton: I use Foobar on the PC to play music and it has Mathaudio equalizer to adjust frequency response. Mathaudio (free) uses a microphone to adjust the frequency reponse to the room and also displays the speaker reponse in a graph. The treble in the Denton at 20 hours playing at a decent clip (too loud for near listening on a desk next to the computer) shows a drop off starting from about 7 Khz and around 4 - 5 dB down around 10 Khz. About 15dB down at 20Khz. Initially there was a gradual dip of approx 5dB centred around 2Khz but as time went on this became a lot less pronounced and shifted more upwards. I suspect it is the woofer / mid starting to loosen up.
Voice reproduction is better than many others that I've heard but not to the level of being "almost realistic" as with the LS3/5A or the LS5/12. The best I ever heard was the LS3/5A with a KEF contructor CS1 on top and slightly rotated. Stupidly I wanted "more bass" and sold that combination off and have been searching ever since.
The Monitor Audio speakers were annoying to me with a treble that I found "metallic" and "harsh". (same as the Focal that I had prior, since then I have stayed away from metal tweeters). Around approx 130 Hz is a 4 - 6db peak (L and R) and there is a smaller peak of a couple db around 250 hz. The bass I find "typical" of bass reflex and not as tight as in a transmission line or a mass loaded Voigt ("metronome" - but those become quickly too tall and ugly). I do get some room resonances with the Denton's which do not happen with LS3/5A or metronomes. (but the metronomes cannot be put on my desk so they are not a permanent option).
Imaging is not as good as with a single driver (Fostex FE167E, Fostex FE1278E, Fostex FF105Wk or Fostex FF125WK) but to me it is very acceptable. Problem is that with a single driver setup I need to have "my head in a vice" otherwise I loose the imaging. With the Denton I can move quite a bit around and still have good imaging, the Denton's are far better than the Fostex when working at a desk.
As expected with a 5" woofer/mid the drywall cannot be dislodged from the walls. No surprise there but bass levels are very respectable for a 5" and I prefer the bass above the LS3/5A. (It does help that I use a tube amplifier) For me the ~ 12 watt is more than enough in my office to produce uncomfortable near field listening levels. It does not produce the "slap" to the chest that the 98dB BR gives me (two Fostex FE167E / side).
(We once went to a show home that was for sale. It had a genuine home theatre with theater chairs and a powerfull sound system where the walls rumbled with explosions and tanks rolling in the movie. Fasteners in the drywall were clearly visible and corners had lost some of their fillings. We immediately lost interest in purchasing the place.)
Although these speakers have the same numbering they do not have the same sensitivity matching between the left and right box I reckon there is about 1.5dB difference between them. (e.g. for the LS3/5A I believe the specification is for less than 0.5 dB)
For my office/library these are ideal, I do not have to adjust the volume as often as with the Fostex (that have more dynamics). They are more "polite" in respect that they do not draw the attention to errors in recording, music that is unlistenable on a single driver is now not too bad and listenable. At this stage it looks unlikely they'll finish up in the lounge. Horses for causes.
I want to add felt squares and the frames of the grills have timber in places where there should not be timber. The labels are not sitting nice and square on the fronts which I find visibly annoying. Under certain light (from which direction is the light falling on them) the frames of the grills become noticeable. So it is likely that I will remove the grill cloth, reshape the frame (so that the felt squares can be used) and then use black speaker cloth and attach the label at the bottom corner (not enough space left when the felt is at the top).
I will give another update when I arrive at approx 80 - 100 hrs of "running in", the speakers have now been used for 35 hours and the voices are still improving so it will be interesting where that eventually finishes up.
AM