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Balanced mode radiator speaker review. True anechoic measurements
Balanced mode radiator speaker review. True anechoic measurements
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Old 1st April 2014, 03:12 PM   #1
Remlab is offline Remlab  United States
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Default Balanced mode radiator speaker review. True anechoic measurements

SoundStage! Hi-Fi | SoundStageHiFi.com | Cambridge Audio Aero 2 Loudspeakers
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Old 1st April 2014, 03:31 PM   #2
Greebster is offline Greebster  United States
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Looks like a dipole peak at ~7kHz and corresponding null after. Typical from what I've seen of BMR's in general.
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Old 1st April 2014, 03:42 PM   #3
Juhazi is offline Juhazi  Finland
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It can't be dipole peak, it is most likely just diffractions from the rolled rubber surround and the baffle. Measurements are ugly but I'd like to hear this IRL. It would be interesting to measure the tweeter as a dipole too. Similar 3" tweeter appeared today in another thread here.

SoundStageNetwork.com | SoundStage.com | NRC Measurements: Cambridge Audio Aero 2

Xo i claimed to be 250Hz, which might be true as we see very high distortion around 200Hz!
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Last edited by Juhazi; 1st April 2014 at 04:08 PM.
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Old 1st April 2014, 04:08 PM   #4
Greebster is offline Greebster  United States
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True it's not, but is just as offending. Possibly due to the phase change BMR's exhibit as the surround doesn't appear to be that large imo.
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Old 1st April 2014, 04:59 PM   #5
Remlab is offline Remlab  United States
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The reviewer replaced these(The best measuring speakers I've ever seen)
SoundStageNetwork.com | SoundStage.com | NRC Measurements: Magico S5 Loudspeakers with the Cambridge's and was still very, very impressed. Makes you wonder..
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Old 1st April 2014, 06:36 PM   #6
Juhazi is offline Juhazi  Finland
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Homepage of the original BMR drivers CSS

Crossing these at 250Hz is crazy, around 4-500Hz would be much better. I hope that we will see more speakers using BMR drivers. I did not find any retail sellers yet.
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Old 1st April 2014, 06:48 PM   #7
Remlab is offline Remlab  United States
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Originally Posted by Juhazi View Post
Homepage of the original BMR drivers CSS

Crossing these at 250Hz is crazy, around 4-500Hz would be much better. I hope that we will see more speakers using BMR drivers. I did not find any retail sellers yet.
I think that Parts Express still might be selling them from a manufacturer buy out. Unsure of quality, though.
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Old 1st April 2014, 07:22 PM   #8
Cal Weldon is offline Cal Weldon  Canada
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Balanced mode radiator speaker review. True anechoic measurements
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and was still very, very impressed. Makes you wonder..
I tuned out right after this:

"and the DH Labs cables lack the purity and clarity of the Siltechs and Crystals."
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Old 1st April 2014, 08:01 PM   #9
Juhazi is offline Juhazi  Finland
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Well, I have been reading about speakers using BMRs. There are two sizes - 2½" and 4½" CA is using the small one and Rega R10 Rega Research Limited the bigger one as the mid in a 3-way.

Rega says that many people prefer a more clear and solid imaging, that's why they use a dome tweeter above 6kHz...

CA uses 2½" from 200Hz up and suffers from distortion there...

Summary - although being a really special invention and product, BMR does not give universal solution for hi-fi mid-high frequency reproduction. Compromises are needed.

This is the dispersion of my prototype 3-way, Avalon style narrow cabinet with 8" woofers, 4" mid and 3/4" tweeter. Low directivity, low distortion - interdriver vertical lobing problems do exist anyhow and perhaps coherence is not perfect... choose your way!
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Old 1st April 2014, 08:17 PM   #10
Lojzek is online now Lojzek  Croatia
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Originally Posted by Cal Weldon View Post

I tuned out right after this:

"and the DH Labs cables lack the purity and clarity of the Siltechs and Crystals."
Bummer, now I'll have to apply for a loan and buy the silky crystals cables.
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