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GoldenEar BRX Review (high-end Bookshelf Speaker)

Rate this speaker:

  • 1. Poor (headless panther)

    Votes: 98 45.2%
  • 2. Not terrible (postman panther)

    Votes: 100 46.1%
  • 3. Fine (happy panther

    Votes: 14 6.5%
  • 4. Great (golfing panther)

    Votes: 5 2.3%

  • Total voters
    217

Alice of Old Vincennes

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It's not a folded ribbon--it's more like a folded planar--pleats that expand and contract to "spit" the sound out. A ribbon tweeter, which has no voice coil of any kind, works on a different principle, and has some advantages and disadvantages.
Same problem. They beam. I have experienced planers. Sweet spot was about 18 inches.
 

Billy Budapest

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Same problem. They beam. I have experienced planers. Sweet spot was about 18 inches.
Totally different mechanics. That’s like saying that dome tweeters beam—and some do, but they aren’t ribbon tweeters.

You just messed up. That’s OK. We all do that sometimes! :)
 

Billy Budapest

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Most AMT's are fairly wide, which is why they have narrower dispersion than a true narrow ribbon like the the RAAL 64-10. But other things equal, they an be crossed lower and have more power handling.
But also, let’s talk about the mechanical action of sound reproduction.

Both dome tweeters and ribbon tweeters are pistonic, producing sound waves by moving back and forth via EMF induced in either the voice coil and the magnet for a dome tweeter or via current running through through the aluminum ribbon and interacting with the magnets via the Lenz effect.

An AMT tweeter, on the other hand, does not rely on pistonic action to produce sound. Rather, the aluminum traces in the folds of each of the Mylar pleats create a sinusoidal motion which squeezes the air forward from the folded Mylar membrane.

So, you could say that a ribbon tweeter is more similar to a dome tweeter than to an AMT tweeter.

Now, there are certain similarities between an AMT tweeter and a Linaeum tweeter, but that’s a different discussion.
 

Dennis Murphy

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But also, let’s talk about the mechanical action of sound reproduction.

Both dome tweeters and ribbon tweeters are pistonic, producing sound waves by moving back and forth via EMF induced in either the voice coil and the magnet for a dome tweeter or via current running through through the aluminum ribbon and interacting with the magnets via the Lenz effect.

An AMT tweeter, on the other hand, does not rely on pistonic action to produce sound. Rather, the aluminum traces in the folds of each of the Mylar pleats create a sinusoidal motion which squeezes the air forward from the folded Mylar membrane.

So, you could say that a ribbon tweeter is more similar to a dome tweeter than to an AMT tweeter.

Now, there are certain similarities between an AMT tweeter and a Linaeum tweeter, but that’s a different discussion.
I believe that's what I said, more succinctly.
 
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