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vinylithicum wrote:

Here are some of my observations regarding the Wolf von Langa RCA 1428 replica. I long time wondered where mr. von Langa gets his phase correction elements and the diaphragm for his RCA 1428 replica. It's obvious that a niche-manufacturer such as W. von Langa doesn't have the production facilities to cast his own phase correction elements, especially since the original RCA 1428 phase correction element is a very elaborate engineering masterpiece and even nowadays very difficult to cast. Most foundries wouldn't even bother to try. Way too expensive.......... So, where does mr. von Langa get the parts? Last Friday, I figured it out, because I more or less incidently came across the B&C speaker website. This Italian manufacturer enjoys a good rep in the professional audio business. Suddenly, I clicked the B&C DCM50 2" HF driver spec sheet and when I saw the picture, I knew where mr. von Langa gets the parts he needs to complete his RCA 1428 replica. Feel free to explore mr. von Langa's kilimanjaro-website and compare the pictures of his RCA 1428 replica with the picture of the DCM50 driver on the B&C speaker website. Besides from the magnets, the resemblance is striking. Mr. von Langa buys B&C DCM50 drivers, discards the original neodymium magnet, then cuts of the from the back of the original DCM50 protruding "cooling-fingers", in order to be able to bolt on his huge elecromagnet. Then he sells this contraption as RCA 1428 replica, which it is obviously not, it's a modified B&C DCM50 HF driver. And it costs a lot of money too. I bet that the original B&cC speakers are way cheaper than the von Langa modified ones.

Maurice, you might be right. I do not know RCA drives well to be able to confirm or deny what you are saying. Frankly speaking to me it is very much irrelevant if Wolf von Langa made it from RCA blueprints or converted B&C to electromagnet. I more interested in the performances of a driver then from it’s history. If you read my site then you know that that fact the driver (or anything) is by “RCA blueprints”, or by “WE blueprints”, or “Klangfilm blueprints” is absolutely not indicative to be about the diver sound. I do not support the stupid devotion to vintage brands. It is not because I do not admit that very few selected vintage components were very good performers. It because I know that absolute majority the vintage people, who are choking with saliva and  losing consciousness while they are gluing to their horribly- sounding playbacks labels “Bell Labs” or “Telefunken”, are in fact Morons.

You see, we have very few true personalities in Audio, mostly whoever in audio are ether idiots or retards, personality-wise. How many people you will see in audio today who would say”Fuck all your WE and Marconi. I am the master of my sound, I know how the things need to be done and here is the result”, saying all of it while demonstrating the result that would be a true personal statement about Sound. You do not see those people in audio too frequently. All that you see today are hundreds of Wolf von Langas who know that the audio retards would “bite” the “RCA” label and this is what he is trading to them. I have to note that I use Wolf von Langa name as an illustration. I have no idea what his drivers are and how they sound.  They might be better than RCA, who knows.

BTW, one thing you are right – the source of the diaphragms is the key. If I would be able to make my own diaphragms I would be making my own drivers. I know a number of people with good drivers ideas but with no good diaphragms. In fact if I were interested in audio business then I would make “specially sounding” diaphragms. There is no competition in this market and the demand is not fulfilled.

vinylithicum wrote:

Maybe it would be interesting to buy 6 B&C DCM50drivers and then leave one pair original, rebuilt one pair with field coil motors and rebuilt the last pair with alnico magnets. Then one would be able to make a precise assessment regarding the sonic differences between the magnetic circuits.

http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=1929#1929

There are a lot of people who convert perm magnet to electromagnets but listening what they say I find their comments absolutely not credible as it contains many ether technical or methodological mistakes. If you find one public attempt that you feel worth to read then let me know.

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