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History and Types of Speakers - Edison Tech Center
https://edisontechcenter.org/speakers.html
The standard dynamic loudspeaker that we know of today was first built in the 1920's and uses a magnetic field to move a coil or magnet which is connected to a diaphragm. There are other kinds of speakers/sound amplification devices …
RadiolaGuy.com : battery radio speakers
https://www.radiolaguy.com/Showcase/Speakers/speakers.htm
The disc (or cone speaker) were introduced in the mid late 1920's and were compatible (and proper for use) with any brand 1920's radio. This applies to either battery or the early AC sets. The exception was some of the AC operated sets …
Antique Radio Forums • View topic - 1920's speaker?
https://www.antiqueradios.com/forums/viewtopic.php?t=209613
There's a gentleman named Floyd A. Paul, out in California, who wrote the book "Radio Horn Speaker Encyclopedia" but I don't have his phone number or email address. He would know something about that speaker. He was a collector and …
Modern Speaker/Headphones for 1920's Radio?
https://www.antiqueradios.com/forums/viewtopic.php?t=35751
Hi, Andrew- One way you can use a modern type speaker or headphone with an antique 20s radio which calls for a "high impedance" speaker is to use an audio output transformer, such as one from a junker 40s or 50s tube radio. The impedances may not be exact, but should be close enough to get good results.
RadiolaGuy.com : Gallery of Antique Radio Speakers of the ...
https://www.radiolaguy.com/Showcase/Speakers/Vintage%20Cone%20Speaker%20Gallery.htm
click for more detail. < Click/Tap image for Horn Speaker gallery. >> I mportant info about 1920's radio speakers. Photo Gallery (below), if you see something you like, feel free to. make an offer (some items may no longer be in my possession). The "American" (by O'neil) < click for more detail. Brandes Ellipticon.
MAD 1920S : care-audio.com
https://www.care-audio.com/product/mad-1920s
MAD 1920S. $1,625.00 – $3,250.00. Monitor Speaker (Signature version of MAD 1920) The 1920S by MAD, is hand-made in England. It is a superior monitor with excellent tonal properties, and a vast, panoramic soundstage. Ultra-Precision Mid/Bass Driver • Neodymium Supersonic Tweeter • Point-to-Point Wired Crossover w/ Silver Solder.
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