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In the Forum: Audio For Dummies ™
In the Thread: UHF capable tweeters and the moronic conclusions

Post Subject: The same vs. coordinated.Posted by Romy the Cat on: 9/17/2012

The notion of coordination in MF & HF tandem is very important. I do not even think that they need to be the same. If the MF and HF drivers have the same topology then they still are not the “same”. A HF will be much smaller with smaller and lighter diagraph, exposed to completely different air damping pressure or whatever else damping they use. The VC are different, with different capacitance, inductively, mass and breaking patterns. I never seen anybody claim that they made HF driver in identical way to HF. So, what would it be identical? Well, I think identical would be if MF and HF driver have the same static and dynamic TTH characteristic at low and high currents:

http://www.GoodSoundClub.com/TreeItem.aspx?PostID=5874

Shall it assume the identical topology? Well, if a helicopter and automobile travel with the same speed than does it mean that they rely upon the identical propulsion topology?

We all agree that MF and HF shall sound the same but I do not pretend that I know how topology relates to sound. I do not build drivers but use the existing driver. I very much do not that that the manufacturers who build drivers know how topology relates to Sound as I am pretty sure that that juts render the well-known know-how and get sound as it happens. I think viola, trombones and harpsichord makers build their products to get specific sound. Audio makers, in particularly the drivers manufactures do not do it.

So, what I mean by coordination? I mean that the driver have to produce sounds that have similar “feel”. I do not know any better way to do it then my “sit down” test that I have been employing with Macondo for over 10 years. There is no way to measure it or to approach it from any other known to me perspective.

Sure, there ARE some topological contradiction. Get paper MF and try to integer it with ion tweeter? Good luck with that but I would argue that the problem in that case was not topological but rather the problem with sonic output. The difference in topology of cause is the key in THAT example but acknowledging a difference in topology does not provide any useful or self-educational answers.

The Cat

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