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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox S2 with Electromagnets
Post Subject: Some further explanationsPosted by haralanov on: 2/25/2010
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 Romy the Cat wrote:
Haralanov, I do not mock you, I juts report the facts of my past experiences.

No, you do not mock me. My experience is exactly the same.
 Romy the Cat wrote:
In fact I personally feel that to a large degree all those comments about advances of electromagnet harmonics come from the facts that the electromagnets are more rolled off at the competitive flux force. Look for instance you, Haralanov, report:
“…typical "screamyness" is still there as if the sound comes from a very little zone, stuffed and compressed in the middle of the speaker with tizzing top octave response …. as it shoots with laser gun right in your eyes. “


My description about the sound of drivers using permanent magnets was quite exaggerated. Actually the good ones (with perm magnets) sound exactly as you just described – “they are lush and very elegant”, but ONLY if the listener has not listening experience with really good field coils. If you hear really serious performing driver with electromagnet, you will very soon realize what I wanted to say.

 Romy the Cat wrote:
Take your driver with “tizzing top octave response” and…

My driver has not even a single trace of  tizzing top end. Tizzines is intrinsic feature of ribbon drivers (including RAAL), not of well designed paper drivers. Actually, the heart of my acoustic system is ultra high performing midrange – high midrange driver with central alnico magnet, wooden spider and leather surround. You could see it here:   http://bgaudio.org/forums/viewtopic.php?f=1&t=17682

Now I’m listening to even better drivers (field coil) powered with 10 x 12V accumulators. You can see a close shot of the paper it uses:

IMG_2530.jpg
 Romy the Cat wrote:
What I am trying to say is that in my view methodologically you all guys do a mistake by comparing badly performing perm magnet drivers with badly performing electromagnet.
Badly performing drivers are out of my scope.
 be wrote:
The diference you observed between high and low impedance fieldcoils, where they in the same unit and did you use the same kind of power supply? 

Nope, I have never made such a comparation, because therе is reason why low voltage motor do not perform at the level of  high voltage motor. I will not go into further discussion why it is so.

Best regards,
Haralanov

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