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AXPONA 2017: Classic Audio Speakers

amirm

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Classic Audio Speakers

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Instead of permanent magnet, these speakers use a DC power supply and a coil to create the same.
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When I walked this, a fantastic Reel to Reel tape was playing and just finished. Wish they would have played more.
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Man, this guy has amazing library of tapes.
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amirm

amirm

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Oh, they did actually play an UltraAnalog Reel to Reel tape:
I used Shazam to discover Violin Sonata No. 7 In C Minor Op. 30/2: I. Allegro Con Brio by Kiril Troussov & Alexandra Troussova. https://shz.am/t47789556

Sounded much better than LP. But still not very engaging.
 

Blumlein 88

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Thanks for the reporting Amir. I am sure this is just the start. The pictures are great for this.

Now those field coil loudspeakers......now we need a high quality DC supply for the coil and people could make aftermarket supplies plus optimize which kind of cable will carry the DC. Man it could get expensive just to get your voice coils energized. :)
 

RayDunzl

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Hmm...

How about a fixed voice coil opposing the speaker voice coil, run both with the same amplifier current?
 
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amirm

amirm

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Now those field coil loudspeakers......now we need a high quality DC supply for the coil and people could make aftermarket supplies plus optimize which kind of cable will carry the DC. Man it could get expensive just to get your voice coils energized. :)
I actually thought they should have used a better power supply. :) What was there reminded me of ebay Korad brands that are pretty lousy. I would think you want pretty clean 12 volt or its noise would modulate the driver.
 

Blumlein 88

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Hmm...

How about a fixed voice coil opposing the speaker voice coil, run both with the same amplifier current?
While it sounds like a good idea, that wasn't the old classic way it was done. CLASSIC.
 
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