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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox S2 with Electromagnets
Post Subject: Field coils and voltagesPosted by haralanov on: 2/26/2010
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Romy, I will not comment the first part of your post, because it will be offtopic. Let concentrate on the subject of field coils and particularly on the difference between high impedance high voltage fieldcoils and those using thick low impedance wire working with very low voltages. If you ask an engineer about the subject, he will reply that there is no difference and only the value of “Ampere/turns” is the important factor. I wish the things were simple like that Smile
Some time ago you made wonderful analogy on the subject of SETs and low sensitivity speakers:

 http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=3688#3688
 Romy the Cat wrote:
Take (hypothetically only!) your Cat or if you are less lucky your dog. Dump her in bathtub, wash he with soup. Then dry your pet with towel. Then put your pet on a middle of carpet and looks at her fur. It is wet and it is not stick out as it should. Now begin to dry your pet with hair blower for instance. The dryer the pet’s fur will be the more distinctive and the more spatial each individual practical of hair will be. The very same is with upper MF and SET amplifiers.

And the very same is with electromagnets. With those so widely used 12V power supplies (Fertin, Feastrex for instance) the sound is always softer than it should be in reality with severally restricted dynamics and transient response. But the people seems to like it...

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