Originally Posted by mayhem13
there wasn't a coaxial driver that peaked my interest in this area.......until now.....
I don't get what's so exciting about this one? It has low surface area (only a 6.5" frame) so forget about dynamics or decently narrow midrange directivity. Adding insult to injury, the tweeter horn covers most of the radiating surface and is unterminated, so one can realistically expect diffraction everywhere.
So why, exactly, does this driver pique your interest while the Tannoy-style concentrics from B&C, et al., don't?
From my perspective, this itsy bitsy mini driver might be interesting to incorporate into an up-firing omni-style surround (a la Duevel or B&O), but that's the only use of which I can think.
Originally Posted by kgveteran
What is it ? I always wanted three 15" Tannoys as my mains. Fell in love while doing some pro audio work back in the 80's. Each cabinet had a 15" woofer and a 15" coax. 250 watts per cabinet was enough to get 120db in the smallish studio.
If it was in the 1980s, then they were probably the old-style Duals. (I believe the System 215 DMT, with the modern "Tulip waveguide" Dual, came out in 1990 or so.) Do you remember what the tweeter waveguides looked like? Were they propellers or pepper-shaker tops?
As far as the more recent Tannoy Duals, having just last week had a pair of System 15 DMT II's in my home I stand by my earlier assessment that the 12" Duals are a better choice for home use. Even after running Audyssey MultEQ XT, the 15's were audibly rougher in the lower mids than the 12's. (Pre-Audyssey the difference is more pronounced, I think. I write "I think" because with MultEQ XT off I could do a nearly immediate A/B comparison, and the limitations of aural memory + expectations of improvement from MultEQ XT may color my perception there.)
True, some of the difference could be cabinet-related, as I have mine in cabinets with nothing on the baffle to diffract and large roundovers all around, but Tannoy's published measurements for both show the 12's to be smoother as well.
The 15's were more sensitive. To achieve the same levels with the 12's on a 1kHz sine wave I had to move the volume on my 4308ci/A up four clicks, whatever that means. (I think the published difference is 2dB.)
The 15 DMT II's extra dynamic capability may be an asset in very large rooms, but with three 12 DMT II-based mains even listening to music at voice-modulating levels I've yet to hear them sound strained, or even perceptibly "loud." And the 15's are huuuuuuuge. It's really something to see how thoroughly they dwarf the already large 12's.