Size of Midrange Drivers

Bombaywalla --

I have a fair bit of world-wide listening experience & have listened to a lot of speakers (& a lot of electronics) yet to but yet to have a positive experience of a 12" midrange playing midrange. If you look at my systems I do own a Tannoy DMT10Mk2 which has a 10" playing midrange all the way up to 1.4KHz. It sounds good for the most part & is just fine for the use that I've put it to but when I had a time-coherent speaker with a 4.5-5" Eton midrange, the Tannoy was nowhere near that quality.

Having not heard the Tannoy model you own I still believe what you hear could be categorized under 'preference' with regard to certain aspects of sound. Take 6moons review of the Austrain WLM Diva Monitor speakers (for a hopeful illumination):

(excerpts)

10-inch paper cones with hard cloth surrounds simply sound different than 5-inch Beryllium or ceramic cones that are hung off loose butyl rubber. The former are more natural, relaxed and full to my ears. In turn, they're not as overtly 'resolved'. The sharpness and leanness often associated with accuracy is missing.

...

It's a speaker that will tweak certain people because it lacks what they consider prerequisites for a hi-end worthy design - narrow baffles, small midrange drivers, exotic diaphragms, famous tweeters. WLM gets by with apparently lesser ingredients. Still and to my ears, the end result is a more inviting, tastier dish. What that really says about current high-end hifi sensibilities you may ponder yourself in some spare time.

...

As our own Jeff Day reminds us, there's a music lover's perspective which deviates from the studio monitor credo of 'warts'n'all'. Music lovers first and foremost insist on an emotional connection with the music. Secondly, they insist -- very sensibly if you ask me -- that all of their music and not just a very narrow selection thereof be enjoyable. The Diva Monitor conforms perfectly to this omnivorous demand. It's a tone monster. That makes it a fabulous addition to the retro/vintage sector of loudspeaker design where large paper cones with pleated cloth surrounds remain en vogue. Those counter the over-articulated 'starving super model' ideal that's pursued to excess elsewhere. It returns us to the earthy curves of a Sophia Loren, the power and brio of Classic Rock and the soulful tone of a Mesa Boogie.

http://www.6moons.com/audioreviews/wlm/divamonitor_4.html

Time coherency of definately an important factor in sound reproduction, but it's a singular aspect attainable in many forms with many variables. The WLM Diva's are one way to get there, and going by the floorstander version of the Diva's it's a sonic imprinting I enjoyed immensely. In other incarnations though, despite being time coherent speakers, it could be an entirely different matter - to my ears at least.

Phusis,
thanks for the info & the excerpts from the 6mooons.com review. If nothing else, the speaker finish is very nice to look at.
In a similar view both in respect to "Made in Austria" & beautiful looking finishes - at RMAF 2013 I heard a very nice sounding stand mount speaker by Brodmann Acoustics called the FS from their Festival Series. In that hotel room it did much better than its floor-standing bigger brother which they were playing on Sunday morning. Some links to that speaker:
http://brodmannacoustics.com/index.php?id=116

http://www.stereophile.com/content/brodmann-acoustics-festival-series

Maybe I liked it 'coz it has a 5" midrange?? LOL!! :-)
here's a nice write-up on that speaker:
http://hans-deutsch-akustikforschung.com/pics/tests/avmentor.pdf
Look at its step response - exactly what a time-coherent step response should look like (note that it uses a 6dB/octave slope).

Phy hp, from France makes a very good 30 cm speaker. Makes magical midrange

Yes, indeed it does.

Bombaywalla --

They take an interesting approach, Brodmann Acoustics, and seem fairly priced. Never heard them.

One of the more memorable sonic demoes I've had came from the Peak Consult Kepheus at their home facility in Denmark. The twin Audio Technology 5" midrange units presented some of the most natural (and dynamic) mids I've encountered - certainly coming from cones - just as they are beautiful and coherent sounding overall. Although steeply(!) priced it's beyond me why these handcrafted speakers aren't referred to more often, if at all in the "audiophile arena;" it can't be the high price, for that alone seems to have its drawing power all by itself. One suspects that what sounds natural simply isn't interesting enough..

But in the end, to my ears, nothing trumps the ease, tone, clarity and relaxed power from a well-implemented waveguide/horn, preferably conical variants, and larger cones. This sums it up nicely:

I am amazed today that 99% of all "audiophile" speakers are the basic "monkey coffin" cones and domes in a box that have defined the industry for the last forty years. This is fine for general consumer stuff, but, no matter what the price, you can only get so much out of a 5" cone midrange and a 1" dome tweeter, and it isn't enough, in my opinion, for even modest ambitions. It's just the physical nature of the elements involved.

http://www.newworldeconomics.com/archives/2013/111713.html

"It's just the physical nature of the elements involved" - indeed...