Originally Posted by MKtheater
Very nice, is there a way to horn load a ribbon or is that a bad idea? This ribbon is 100 db sensitive? How loud can it go? In a horn it could be much more dynamic but would it lose it's dispersion qualities? I wonder how the eminence kappa lite HO compares to the best 12's as in sound quality and Midbass? In these designs distortion and compression is at a minimum, well, for HT anyways!
As wonderful as many planar drivers (or any driver) can be, and many of them offer incredible performance capabilities, however properly integrating them into a powerful, coherent, yet solidly transparent window into the material is key. IMO, dynamics are vitally important, I mean it's an aspect I preach often in threads daily, and it's even in my signature tag-line. MK's the last one I need to explain the importance of dynamics to, but it's truly a indispensable ingredient to a realistic HT experience. All this said, all the killer realistic dynamics without a solid and cohesive effort between all the speakers elements (drivers, cabinet etc.), the presentation becomes less conducive to extended sessions
free from artifacts and non-linearities,... both those easily heard and those more subtle.
My point is, as fun as it is considering different drivers and exchanging them into various existing designs, it's difficult at best to achieve a coherent, uncolored, transparent design that's free from peaky resonances, diffraction issues, and most importantly, powerful uncolored mid-band that doesn't harshen up at live levels. I'm certain MK realizes this, however many following along may not.
FWIW,...I've experimented significantly with high sensitivity/high output designs in the home environment. Not DIY, but off the shelf products. I've taken measurements, but I'm concerned with subjective differences at the LP, and how high power pro approaches translate in the typical home HT space,..small room acoustics. The above issues are exactly the obstacles I've found; peaky resonances, diffraction problems, colored mid-band that does harshen up at live levels. So, the holy grail are high output designs that employ work-arounds to these issues. In many inexpensive, less than properly optimized approaches, you can get pounding dynamics, but not without artifacts. Weighing what characteristics you can live with is key. For me, without hearing many designs, cabinet solidity, inertness etc., can quickly eliminate many prospects. Merely matching up driver sensitivities and exchanging drivers, one can end up chasing your tail.
Some of those characteristics are easily heard, some flesh out over time.
MK, again, I enjoy your enthusiasm, and your search for your equipment choices. Thanks for sharing so many details. Many don't care for the subjective opinions etc., I've got no problem with it.
Keep up the good work.
Now, on to your OmniMic graph, what level of smoothing is applied, and where exactly is the measurement taken? How hot are your subs relative to the midband? What kind of signal shaping, etc., is applied with the subs in the graph? Have you measured/calculated how much PVG you've got, and where it kicks in?
Have fun with the OmniMic, it's a nice tool. I've been playing/experimenting with it's capabilities for a year now.
All the best