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In Reply to: RE: REVIEW: Avantgarde Trio Speakers posted by moray james on March 30, 2014 at 21:30:20
Right and wrong at the same time.All the Avantgarde models come with amplifier for the woofers, so their efficiency (or lack thereof) is moot.
The Community M200 used in the midrange of the Trio is about 108.5dB/W on a horn with a Di=7. The horn they are on looks like a tractrix, and could very well have a Di=10, and thus it would be 111.5dB. It very well may be that high as they have a special voice-coil made for their M200 so as to not have to use a resistive pad in the network.
Same comments apply to the Beyma CP380M they use for the tweeter.
The link is a similar HF driver from Faital Pro on a tractrix horn, it looks like you could claim it to be 110dB (which they do).
http://www.communitypro.com/files/literature/spec%20sheets/M200A_SPEC.pdf?phpMyAdmin=c9cc5b3953d87385dc22218d669e7aab
http://www.usspeaker.com/beyma%20CP380M-1.htm
Note, the Beyma is on a CD horn, so it would have more HF on the type of horn in the Trio.
Edits: 04/01/14Follow Ups:
The Avantgarde mid driver does not look like the Community M200s I have here.
There is a cover on the back, and the voice-coil top-chamber is a bit different.
The M200A is no longer available (as I think that was what Avantgarde uses)
The M200 requires a low-pass filter to remove the peak that the M200A top-chamber removed.
I have a photo montage from a magazine review on my hard-drive at home that shows the three drivers from the Trio, it's easy to see the M200A details.
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