Yeah, saw the picture you posted of one of those. They're from the mid '70's, right? I bet those sound really-nice (Must have been a fairly-expensive speaker if they were still using alnico drivers in the mid '70's... Few companies were, due to the much-higher cost). I'm especially-critical when it comes to judging a speaker's midrange-response. My next big purchase will be an amp, either tube or solid-state, so I can get even cleaner upper-mids & highs. It amazes me how clean a lot of these older speakers are. Some of the cleanest/clearest/best-sounding are also among the oldest.
Yup my GAMMA 50's where built in 1975, at least that what's written inside the box.
But the VLD-12's came out in the early 70's, not too long after the original Stanley Kelly ribbon tweeter, and this is no coincidence as it is a total ripoff of the original Kelly design.
GAMMA did make improvements though, the VLD-12 is more efficient then the DK30.
The VLD-12's where made in Bulgaria before the fall of the iron curtain, so at the time they where very cheap compared to western brands.
Their designs where basic, everything that could be done cheaply without impacting the sound, was done to the fullest.
But many of their old designs are still in production today, the VLD-12 has been replaced by the VLD-13 which has a mounting mechanism for the ribbons, something the VLD-12's lack and it still has AlNiCo magnets.
The reason GAMMA kept using AlNiCo magnets is because cobalt was expensive in the west, but not in the communist states.
An interesting link about the Decca Kelly ribbons:
http://www.soundfountain.com/amb/ribbon.html
And here something about paper drivers:
http://www.mother-of-tone.com/speaker.htm
I agree, mids are important, so I have plans to build a new pair of speakers, with VLD-12 ribbons and some 6" Wavecor Nomex drivers, two per side.
I have a feeling the GAMMA 50's will surprise me again once those speakers get built, they have kept doing that for the last 17 years so why not again.
Well I'm sure some of the really nice modern speakers sound very clear too, but it seems it was a more common trait in older speakers, I blame plastic cones.
Here's a pair of speakers I want to find someday. They're just little, old vintage bookshelf speakers, but they're voiced just the way I like. Timbre is right on, and I love how organic and lifelike they sound. Very-open for such a small speaker. These would be excellent for an office system playing jazz and classical and the occasional Beatles track...
http://www.youtube.com/watch?v=R75sr4c7CGM
Those do look very nice, very vintage indeed, much like some of the old B&O's.