Originally Posted by DonH50
I am curious: how broad is the dispersion of the ribbons in the in-wall (ceiling, whatever) speakers? I ask because my past experience with smaller ribbon tweeters (a.la. Decca, Infinity QLS, couple of others I have forgotten) was that they were fairly "beamy". I assume the designs are more refined, and/or there's a horn or something on them, else they would seem unsuitable for surround speakers? I use Magnepans and they work fine, but their line source ribbons have a much larger radiating area than most small tweeters.
As I said, I do not know, my experience is (very) old, just curious.
Thanks - Don
Just to be clear, the BG radia ribbons are Planar ribbons. Meaning it is not a true "ribbon". That said, the BG Radia Planar tweeter has excellent horizontal off axis response. Vertically they are limited as most ribbons are. But what sets BG's tweeter apart from most other ribbons, is their very low distortion characteristics. Making the highs very natural sounding and extremely clear.
Though I am not necessarily a big advocate of these types of tests (I do find them interesting none the less), for those that are interested in seeing some detailed specs. there is a pretty interesting article from a few years ago comparing several different types of ribbon tweeters along with a cheap dome tweeter. Many could care less about these detailed tests, so you may or may not be interested in it, but here it is in case you have not seen it: http://www.zaphaudio.com/nondomes/
Too bad that new AMT folded ribbon tweeter that is being used in the new Golden Ear speaker is not in the comparison. I would be interested in seeing its distortion characteristics and off-axis response.
Not that I would base my buying decisions on its results or any of the other results for that matter. As I think I have made it clear in my other recent posts on this forum, that ultimately your ears and your own preferences need to make the decision on what is best suited for each individual, plain and simple.
To be perfectly honest, IMO, In-ceiling speakers are a compromise for any application really. But for some it is the only real alternative, as it is here in jeke11's case. BG Radia is one of the few companies that have ribbon based In-ceilings, which is why I recommended them. Even though I sell them locally in my custom install business, I would not necessarily recommend them for someone who has LCR's with dome based LCR speakers though (but that wouldn't be the end of the world either).
Fact is, there are some other very good In-ceiling speakers with dome tweeters that would be good enough for jeke11 too. Depends on how much he is willing to spend too. Triad, Speakercraft, JBL Pro, Tannoy, Def. Tech. just to name a few at different price points and quality. Since he has Ribbon fronts, my first choice would be ribbon based surrounds. That said, as I have said before the rears are less important to match then are the LCR speakers. With built-in EQ systems like Audyssey, you can create a pretty seamless souldfield. Of course identical drivers are usually best.
I need to talk with Jim Salk and ask him to make some In-wall and In-ceiling options!
Just kidding, I don't see Jim going for that one!
In my case given what I like, in my room, the Bipolar SS-202's in particular make excellent ribbon based surrounds. YMMV