chrisby
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I'm a bit late to the party here, but if still of any interest I can offer a couple of observations re the Alpair drivers in particular, as well as on the DNA horn.
Over the past 5 or 6 years, I've experimented with just about every model in the Mark Audio line up since the EL70 ( OEM for Bob Reimer at CSS), in a very wide range of enclosure designs from vented bookshelf to floorstanding MLTL and several back loaded horn and Olson/ Nagaoka labyrinth designs.
To the question at hand, probably the most pertinent differences between the A10.3 (metal) and A10P (paper) are:
A10.3 Fo- 38.Hz SPLo= 87.998 Qts = .316
A10P Fo=42.4Hz SPLo=89.645dB Qts=.330
There's also a rather marked difference in the FR curve above 5K, with the paper showing a gentle rolloff, while the metal rises almost 10dB - cresting at approx 10K, then rolling off at approx the same rate as the paper .
In short, the metal will go lower in an appropriately tuned box, and has a more forward and dynamic delivery in the upper mids to top, while the paper is smoother overall and has almost 2dB more sensitivity.
I'm currently using an A10P as the center channel in a small 7.1 home theater, and am quite happy.
As for the DNA - I built a pair a few years ago with removable mounting plates to facilitate swapping of drivers. So far I've tried Tang BandW4-1879, Alpair7.3, and Fostex FE126E, FF126Wk.
Later this afternoon will be firing them up with some A10Ps, and perhaps even A10.3.
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